Vulnerability is one of the least examined concepts in research ethics. Vulnerability was linked in the Belmont Report to questions of justice in the selection of subjects. Regulations and policy documents regarding the ethical conduct of research have focused on vulnerability in terms of limitations of the capacity to provide informed consent. Other interpretations of vulnerability have emphasized unequal power relationships between politically and economically disadvantaged groups and investigators or sponsors. So many groups are now considered to be vulnerable in (...) the context of research, particularly international research, that the concept has lost force. In addition, classifying groups as vulnerable not only stereotypes them, but also may not reliably protect many individuals from harm. Certain individuals require ongoing protections of the kind already established in law and regulation, but attention must also be focused on characteristics of the research protocol and environment that present ethical challenges. (shrink)

Pragmatic clinical trials offer important benefits, such as generating evidence that is suited to inform real-world health care decisions and increasing research efficiency. However, PCTs also present ethical challenges. One such challenge involves the management of information that emerges in a PCT that is unrelated to the primary research question, yet may have implications for the individual patients, clinicians, or health care systems from whom or within which research data were collected. We term these findings as?pragmatic clinical trial collateral findings,? (...) or?PCT-CFs?. In this article, we explore the ethical considerations associated with the identification, assessment, and management of PCT-CFs, and how these considerations may vary based upon the attributes of a specific PCT. Our purpose is to map the terrain of PCT-CFs to serve as a foundation for future scholarship as well as policy-making and to facilitate careful deliberation about actual cases as they occur in practice. (shrink)

The long-standing overarching policy governing research with human subjects conducted and supported by most federal agencies and departments in the United States, known as the Common Rule, has recently been revised, with most requirements slated to become effective in 2018. Although there are multiple alterations to the current regulations, some of the most significant changes aim to enhance consent for research. While some of the particular provisions in this regard will be easy to apply and promise to help meet this (...) goal, others may be more challenging to implement despite their intuitive appeal. In this article, I examine some of the provisions in the revised Common Rule that relate to consent: new required consent elements; the goal of comprehension in the consent process; consent forms; and broad consent. By raising issues about these provisions now and suggesting possible ways to overcome their potential shortfalls, the hope is that future efforts can be taken to help clarify and appropriately implement them. (shrink)

BackgroundCommunity engagement in research has gained momentum as an approach to improving research, to helping ensure that community concerns are taken into account, and to informing ethical decision-making when research is conducted in contexts of vulnerability. However, guidelines and scholarship regarding community engagement are arguably unsettled, making it difficult to implement and evaluate.DiscussionWe describe normative guidelines on community engagement that have been offered by national and international bodies in the context of HIV-related research, which set the stage for similar work (...) in other health related research. Next, we review the scholarly literature regarding community engagement, outlining the diverse ethical goals ascribed to it. We then discuss practical guidelines that have been issued regarding community engagement. There is a lack of consensus regarding the ethical goals and approaches for community engagement, and an associated lack of indicators and metrics for evaluating success in achieving stated goals. To address these gaps we outline a framework for developing indicators for evaluating the contribution of community engagement to ethical goals in health research.SummaryThere is a critical need to enhance efforts in evaluating community engagement to ensure that the work on the ground reflects the intentions expressed in the guidelines, and to investigate the contribution of specific community engagement practices for making research responsive to community needs and concerns. Evaluation mechanisms should be built into community engagement practices to guide best practices in community engagement and their replication across diverse health research settings. (shrink)

Despite recent advances in HIV prevention and treatment, high HIV incidence persists among people who inject drugs. Difficult legal and political environments and lack of services for PWID likely contribute to high HIV incidence. Some advocates question whether any HIV prevention research is ethically justified in settings where healthcare system fails to provide basic services to PWID and where implementation of research findings is fraught with political barriers. Ethical challenges in research with PWID include concern about whether research evidence will (...) be translated into practice; concerns that research might exacerbate background risks; and ethical challenges regarding the standard of HIV prevention in research. While these questions arise in other research settings, for research with PWID, these questions are especially controversial. This paper analyses four ethical questions in determining whether research could be ethically acceptable: Can researchers ensure that research does not add to the burden of social harms and poor health experienced by PWID? Should research be conducted in settings where it is uncertain whether research findings will be translated into practice? When best practices in prevention and care are not locally available, what standard of care and prevention is ethically appropriate? Does the conduct of research in settings with oppressive policies constitute complicity? We outline specific criteria to address these four ethical challenges. We also urge researchers to join the call to action for policy change to provide proven safe and effective HIV prevention and harm reduction interventions for PWID around the world. (shrink)

Despite recent advances in HIV prevention and treatment, high HIV incidence persists among people who inject drugs. Difficult legal and political environments and lack of services for PWID likely contribute to high HIV incidence. Some advocates question whether any HIV prevention research is ethically justified in settings where healthcare system fails to provide basic services to PWID and where implementation of research findings is fraught with political barriers. Ethical challenges in research with PWID include concern about whether research evidence will (...) be translated into practice; concerns that research might exacerbate background risks; and ethical challenges regarding the standard of HIV prevention in research. While these questions arise in other research settings, for research with PWID, these questions are especially controversial. This paper analyses four ethical questions in determining whether research could be ethically acceptable: Can researchers ensure that research does not add to the burden of social harms and poor health experienced by PWID? Should research be conducted in settings where it is uncertain whether research findings will be translated into practice? When best practices in prevention and care are not locally available, what standard of care and prevention is ethically appropriate? Does the conduct of research in settings with oppressive policies constitute complicity? We outline specific criteria to address these four ethical challenges. We also urge researchers to join the call to action for policy change to provide proven safe and effective HIV prevention and harm reduction interventions for PWID around the world. (shrink)

There is considerable confusion regarding the ethical appropriateness of using incentives in research with human subjects. Previous work on determining whether incentives are unethical considers them as a form of undue influence or coercive offer. We understand the ethical issue of undue influence as an issue, not of coercion, but of corruption of judgment. By doing so we find that, for the most part, the use of incentives to recruit and retain research subjects is innocuous. But there are some instances (...) where it is not. Specifically, incentives become problematic when conjoined with the following factors, singly or in combination with one another: where the subject is in a dependency relationship with the researcher, where the risks are particularly high, where the research is degrading, where the participant will only consent if the incentive is relatively large because the participant's aversion to the study is strong, and where the aversion is a principled one. The factors we have identified and the kinds of judgments they require differ substantially from those considered crucial in most previous discussions of the ethics of employing incentives in research with human subjects. (shrink)

Beyond Consent examines the concept of justice, and its application to human subject research, through the different lenses of various research populations: children, the vulnerable sick, captive and convenient populations, women, people of colour, and subjects in international settings. Separate chapters address the evolution of research policies, implications of the concept of justice for the future of human subject research, and the ramifications of this concept throughout the research enterprise.

It is unclear whether the regulatory distinction between non-identifiable and identifiable information—information used to determine informed consent practices for the use of clinically derived samples for genetic research—is meaningful to patients. The objective of this study was to examine patients' attitudes and preferences regarding use of anonymous and identifiable clinical samples for genetic research. Telephone interviews were conducted with 1,193 patients recruited from general medicine, thoracic surgery, or medical oncology clinics at five United States academic medical centers. Wanting to know (...) about research being done was important to 72% of patients when samples would be anonymous and to 81% of patients when samples would be identifiable. Only 17% wanted to know about the identifiable scenario but not the anonymous scenario. Curiosity-based reasons were the most common among patients who wanted to know about anonymous samples. Of patients wanting to know about either scenario, approximately 57% would require researchers to seek permission, whereas 43% would be satisfied with notification only. Patients were more likely to support permission in the anonymous scenario if they had more education, were Black, less religious, in better health, more private, and less trusting of researchers. The sample, although not representative of the general population, does represent patients at academic medical centers whose clinical samples may be used for genetic research. Few patients expressed preferences consistent with the regulatory distinction between non-identifiable and identifiable information. Data from this study should cause policy-makers to question whether this distinction is useful in relation to research with previously collected clinically derived samples. (shrink)

Biomedical and behavioral research may affect strongly held social values and thereby create significant controversy over whether such research should be permitted in the first place. Institutional review boards responsible for protecting the rights and welfare of participants in research are sometimes faced with review of protocols that have significant implications for social policy and the potential for negative social consequences. Although IRB members often raise concerns about potential long-term social implications in protocol review, federal regulations strongly discourage IRBs from (...) considering them in their decisions. Yet IRBs often do consider the social implications of research protocols and sometimes create significant delays in initiating or even prevent such research. The social implications of research are important topics for public scrutiny and professional discussion. This article examines the reasons that the federal regulations preclude IRBs from assessing the social risks of research, and examines alternative approaches that have been used with varying success by national advisory groups to provide such guidance. The article concludes with recommendations for characteristics of a national advisory group that could successfully fulfill this need, including sustainability, independence, diverse and relevant expertise, and public transparency. (shrink)

Television medical dramas frequently depict the practice of medicine and bioethical issues in a strikingly realistic but sometimes inaccurate fashion. Because these shows depict medicine so vividly and are so relevant to the career interests of medical and nursing students, they may affect these students' beliefs, attitudes, and perceptions regarding the practice of medicine and bioethical issues. We conducted a web-based survey of medical and nursing students to determine the medical drama viewing habits and impressions of bioethical issues depicted in (...) them. More than 80% of medical and nursing students watch television medical dramas. Students with more clinical experience tended to have impressions that were more negative than those of students without clinical experience. Furthermore, viewing of television medical dramas is a social event and many students discuss the bioethical issues they observe with friends and family. Television medical dramas may stimulate students to think about and discuss bioethical issues. (shrink)

Empirical research in bioethics can be defined as the application of research methods in the social sciences to the direct examination of issues in [bioethics]. As such, empirical work is a form of descriptive ethics, focused on describing a particular state of affairs that has some moral or ethical relevance. For example, empirical research can help to describe cultural beliefs about the appropriateness of providing health-related information, such as the diagnosis of a life-threatening illness, which informs deliberations about the extent (...) to which it is morally important for clinicians to provide comprehensive information to patients in different cultural contexts. Similarly, empirical research can delineate popular attitudes and experiences related to contentious issues such as abortion, cloning, stem-cell research, and physician-assisted suicide to enlighten discussions and policy formulations regarding them. (shrink)

The successful demonstration that antiretroviral (ARV) drugs can be used in diverse ways to reduce HIV acquisition or transmission risks – either taken as pre-exposure prophylaxis (PrEP) by those who are uninfected or as early treatment for prevention (T4P) by those living with HIV – expands the armamentarium of existing HIV prevention tools. These findings have implications for the design of future HIV prevention research trials. With the advent of multiple effective HIV prevention tools, discussions about the ethics and the (...) feasibility of future HIV prevention trial designs have intensified. This article outlines arguments concerning the inclusion of newly established ARV-based HIV prevention interventions as standard of prevention in HIV prevention trials from multiple perspectives. Ultimately, there is a clear need to incorporate stakeholders in a robust discussion to determine the appropriate trial design for each study population. (shrink)

Empirical research in bioethics can be defined as the application of research methods in the social sciences to the direct examination of issues in [bioethics]. As such, empirical work is a form of descriptive ethics, focused on describing a particular state of affairs that has some moral or ethical relevance. For example, empirical research can help to describe cultural beliefs about the appropriateness of providing health-related information, such as the diagnosis of a life-threatening illness, which informs deliberations about the extent (...) to which it is morally important for clinicians to provide comprehensive information to patients in different cultural contexts. Similarly, empirical research can delineate popular attitudes and experiences related to contentious issues such as abortion, cloning, stem-cell research, and physician-assisted suicide to enlighten discussions and policy formulations regarding them. (shrink)

BackgroundThe pursuit of a cure for HIV is a high priority for researchers, funding agencies, governments and people living with HIV. To date, over 250 biomedical studies worldwide are or have been related to discovering a safe, effective, and scalable HIV cure, most of which are early translational research and experimental medicine. As HIV cure research increases, it is critical to identify and address the ethical challenges posed by this research.MethodsWe conducted a scoping review of the growing HIV cure research (...) ethics literature, focusing on articles published in English peer-reviewed journals from 2013 to 2021. We extracted and summarized key developments in the ethics of HIV cure research. Twelve community advocates actively engaged in HIV cure research provided input on this summary and suggested areas warranting further ethical inquiry and foresight via email exchange and video conferencing.DiscussionDespite substantial scholarship related to the ethics of HIV cure research, additional attention should focus on emerging issues in six categories of ethical issues: social value ; scientific validity ; fair selection of participants ; favorable benefit/risk balance ; informed consent ; and respect for enrolled participants and community.ConclusionHIV cure research ethics has an unfinished agenda. Scientific research and bioethics should work in tandem to advance ethical HIV cure research. Because the science of HIV cure research will continue to rapidly advance, ethical considerations of the major themes we identified will need to be revisited and refined over time. (shrink)

More than 25 years into the HIV epidemic, in excess of 2 million new infections continue to occur each year. HIV prevention research is crucial for groups at heightened risk for HIV, but the design and conduct of HIV prevention research with vulnerable populations worldwide raises considerable ethical challenges. The HIV Prevention Trials Network (HPTN) is a global collaborative network that conducts clinical and behavioural studies on non-vaccine interventions to reduce the transmission of HIV. In 2003, the HPTN developed ethical (...) guidance to enhance the responsible conduct of its research activities and as a distinctive contribution to global research ethics. In what follows, the developments that motivated the drafting of a revised ethics document in 2009 are described, including the process by which that revision took place and some of the key differences between the HPTN ethics guidance and other relevant guidelines in the field. (shrink)

Television medical dramas frequently depict the practice of medicine and bioethical issues in a strikingly realistic but sometimes inaccurate fashion. Because these shows depict medicine so vividly and are so relevant to the career interests of medical and nursing students, they may affect these students' beliefs, attitudes, and perceptions regarding the practice of medicine and bioethical issues. We conducted a web-based survey of medical and nursing students to determine the medical drama viewing habits and impressions of bioethical issues depicted in (...) them. More than 80% of medical and nursing students watch television medical dramas. Students with more clinical experience tended to have impressions that were more negative than those of students without clinical experience. Furthermore, viewing of television medical dramas is a social event and many students discuss the bioethical issues they observe with friends and family. Television medical dramas may stimulate students to think about and discuss bioethical issues. (shrink)

Acentral promise of human embryonic stem cell research is the potential to develop viable therapeutic approaches to a range of devastating diseases and conditions. Despite excitement over such advances, there are scientific and medical reasons to be cautious as stem cells and their products are introduced into patients. In response to such concerns, the International Society for Stem Cell Research as well as ad hoc groups and individuals have offered approaches to governance of this research. While there are similarities among (...) these governance models and they are in principle easily endorsable, in this paper I raise a set of concerns related to their implementation, suggesting areas where gathering data may facilitate more appropriate oversight. Next, I suggest areas that seem to have been neglected as these governance models have been developed so that they may be on the agendas of those seeking to revise these models in the future. Finally, I describe how some of the concerns that have arisen in considering the appropriate governance of stem cell research may be useful in science and translational research more broadly. (shrink)

Participants in clinical research sometimes view participation as therapy or exaggerate potential benefits, especially in phase I or phase II trials. We conducted this study to discover what methods might improve cancer patients’ understanding of early-phase clinical trials. We randomly assigned 130 cancer patients from three U.S. medical centers who were considering enrollment in a phase I or phase II cancer trial to receive either a multimedia intervention or a National Cancer Institute pamphlet explaining the trial and its purpose. Intervention (...) participants were 32 times more likely to believe that the trial’s purpose was to examine safety and 60 % less likely to believe they would experience long-term benefit or cure. There was no difference in enrollment decision. However, while patients’ understanding of the trial’s purpose improved and expectations of long-term benefit diminished, half the respondents still believed they would experience long-term benefit or cure from participation. Therefore, we conclude that multimedia interventions such as this one may help oncologists to explain the risks and benefits of early-phase cancer trials in a way that patients can more easily understand, helping them to make more informed decisions about participation. But further research into other factors that influence patients’ beliefs about the outcome of enrollment is needed, both to modify the interventions and to determine how malleable patient beliefs are. (shrink)

Little research has explored the possible effects of government institutions in emerging economies on ethical reviews of multinational research. We conducted semi-structured, in-depth telephone interviews with 15 researchers, Research Ethics Committees personnel, and a government agency member involved in multinational HIV Prevention Trials Network research in emerging economies. Ministries of Health or other government agencies often play pivotal roles as facilitators or barriers in the research ethics approval process. Government agency RECs reviewing protocols may face particular challenges, as they can (...) lack resources, be poorly organized, have inconsistent review processes and limited expertise, and use differing definitions of national interests, including upholding national reputation and avoiding potential exploitation and stigma of the country's population. The MOH/governmental review body may be affected by power dynamics and politics in study reviews; may consider issues both related and unrelated to research ethics as understood elsewhere; and may prioritize particular diseases, treatments, or interventions over other topics/types of research. Poor communication and deeply-rooted tensions may exist between sponsor and host countries, impeding optimal interactions and reviews. Investigators must understand and plan for the potential effects of governmental agencies on multinational collaborative research, including preserving adequate time for agency review, and contacting these agencies beforehand to address issues that may arise. Better understanding of these issues can aid and advance appropriate global scientific collaboration. (shrink)

In crafting our paper on addressing the ethical challenges in HIV prevention research with people who inject drugs, 1 we had hoped to stimulate further discussion and deliberation about the topic. We are pleased that three commentaries on our paper have begun this process. 2 3 4 The commentaries rightly bring up important issues relating to community engagement and problems in translating research into practice in the fraught environments in which PWID face multiple risks. These risks include acquisition of HIV (...) as well as criminalisation, stigma and lack of access to needed healthcare, prevention and social services. We take this opportunity to respond to the excellent points raised by the commentators. All of the commentaries support our emphasis on robust community engagement with PWID and other stakeholders in designing and conducting HIV prevention research, but urge us to go farther. Wolfe highlights the... (shrink)

Governance models for the oversight of human embryonic stem cell research have been proposed which mirror in large part familiar oversight mechanisms for research with human subjects and non-human animals. While such models are in principle readily endorsable, there are a set of concerns related to their implementation — such as ensuring that an elaborated informed consent process and conducting long-term monitoring of research subjects are tenable — which suggest areas where gathering data may facilitate more appropriate oversight. In addition, (...) it is unclear whether a new governance model based at individual institutions are sufficient to address the ethical issues inherent to this research. Regardless, some of the concerns that have arisen in considering the appropriate governance of stem cell research, particularly the important translational pathway of innovation in contrast to staged research, transparency and publication, and social justice, may be useful in science and translational research more broadly. (shrink)

Ethics guidance increasingly recognises that researchers and sponsors have obligations to consider provisions for post-trial access to interventions that are found to be beneficial in research. Yet, there is little information regarding whether and how such plans can actually be implemented. Understanding practical experiences of developing and implementing these plans is critical to both optimising their implementation and informing conceptual work related to PTA. This viewpoint is informed by experiences with developing and implementing PTA plans for six large-scale multicentre HIV (...) prevention trials supported by the HIV Prevention Trials Network. These experiences suggest that planning and implementing PTA often involve challenges of planning under uncertainty and confronting practical barriers to accessing healthcare systems. Even in relatively favourable circumstances where a tested intervention medication is approved and available in the local healthcare system, system-level barriers can threaten the viability of PTA plans. The aggregate experience across these HIV prevention trials suggests that simply referring participants to local healthcare systems for PTA will not necessarily result in continued access to beneficial interventions for trial participants. Serious commitments to PTA will require additional efforts to learn from future approaches, measuring the success of PTA plans with dedicated follow-up and further developing normative guidance to help research stakeholders navigate the complex practical challenges of realising PTA. (shrink)

In crafting our paper on addressing the ethical challenges in HIV prevention research with people who inject drugs,1 we had hoped to stimulate further discussion and deliberation about the topic. We are pleased that three commentaries on our paper have begun this process.2 3 4 The commentaries rightly bring up important issues relating to community engagement and problems in translating research into practice in the fraught environments in which PWID face multiple risks. These risks include acquisition of HIV as well (...) as criminalisation, stigma and lack of access to needed healthcare, prevention and social services. We take this opportunity to respond to the excellent points raised by the commentators. All of the commentaries support our emphasis on robust community engagement with PWID and other stakeholders in designing and conducting HIV prevention research, but urge us to go farther. Wolfe highlights the difficulty of even engaging with community members in oppressive settings, where authorities severely restrict civil liberties of PWID so that even discussing issues related to drug use and enforcement may place individuals at risk. To overcome such limitations, he appropriately suggests interviewing confidentially those who have previously been detained in closed settings as part of the community engagement process. Similarly, Wolfe observes that critical issues can be overlooked with a narrow focus on study procedures if contextual factors before, during or after a study are ignored. For example, he cites the risk of overdose for study participants who have been abstinent during a study and subsequently resume injecting when the study concludes. These kinds of risks may not be obvious …. (shrink)

The increased use of human biological material for cell-based research and clinical interventions poses risks to the privacy of patients and donors, including the possibility of re-identification of individuals from anonymized cell lines and associated genetic data. These risks will increase as technologies and databases used for re-identification become affordable and more sophisticated. Policies that require ongoing linkage of cell lines to donors’ clinical information for research and regulatory purposes, and existing practices that limit research participants’ ability to control what (...) is done with their genetic data, amplify the privacy concerns. (shrink)

Complementary and alternative medicine is used by many in hopes of achieving important health-related goals. Survey data indicate that 42 percent of the U.S. population uses CAM, accounting for 629 million “office” visits a year and expenditures of 27 billion dollars. This high prevalence of use calls for a careful evaluation of CAM so as to ensure the well-being of those using its modalities. Such an evaluation would obviously include assessments of the safety and efficacy of particular approaches, the training (...) and integrity of practitioners, and the appropriateness of modalities for different conditions or uses. Given the lack of published data concerning many of these aspects of CAM, the likely unfamiliarity of its practitioners to the approaches available to clinicians practicing modern scientific medcine, and the need to respect the unique preferences of persons seeking assistance with achieving health-related goals, it is also important to assess the potential roles of informed consent for the use of CAM. Examining such roles is the central task of this paper. (shrink)

Complementary and alternative medicine is used by many in hopes of achieving important health-related goals. Survey data indicate that 42 percent of the U.S. population uses CAM, accounting for 629 million “office” visits a year and expenditures of 27 billion dollars. This high prevalence of use calls for a careful evaluation of CAM so as to ensure the well-being of those using its modalities. Such an evaluation would obviously include assessments of the safety and efficacy of particular approaches, the training (...) and integrity of practitioners, and the appropriateness of modalities for different conditions or uses. Given the lack of published data concerning many of these aspects of CAM, the likely unfamiliarity of its practitioners to the approaches available to clinicians practicing modern scientific medcine, and the need to respect the unique preferences of persons seeking assistance with achieving health-related goals, it is also important to assess the potential roles of informed consent for the use of CAM. Examining such roles is the central task of this paper. (shrink)

: In light of information uncovered about human radiation experiments conducted during the Cold War, an important charge for the Advisory Committee on Human Radiation Experiments was to assess the current state of protections for human research subjects. This assessment was designed to enhance the Committee's ability to make informed recommendations for the improvement of future policies and practices for the protection of research subjects. The Committee's examination of current protections revealed great improvement over those from the past, yet some (...) problems remain. Although the data collected by the Committee highlight specific areas in need of attention, the Committee's work should be viewed in part as the beginning of a series of ongoing assessments of the adequacy and effectiveness of the protections afforded to human subjects. (shrink)

Researchers and others involved in the research enterprise from 12 African countries met with those working in ethics and oversight in the United States as part of an effort to develop research ethics capacity. Drawing on a wealth of experience among participants, discussions at the meeting revealed five categories of issues that warrant careful attention by those engaged in similar efforts as well as international policymakers and those charged with oversight of research. Principal investigators should build ‘true research teams’ where (...) members of the team are meaningfully involved in decisions regarding the protocol and its implementation. There should be explicit discussion about the ‘standard of care’ at the outset of project planning that includes clarification of the terminology that is being used. While internationally collaborative research may involve populations that have inherent vulnerabilities, it is important to recognize the limitations of host country solutions and look for means to negotiate appropriate protections for those willing to participate. In conducting research involving biological materials it would be prudent to develop material transfer agreements at the outset of the study to clarify expectations and to minimize the likelihood of harm. Those engaged in internationally collaborative research need to be alert to the potential conflicts of interests of host country ethics committees during the approval process and to take measures to manage them if they indeed exist. (shrink)

There has been considerable debate about the ethical acceptability of using placebo-controls in clinical research. Although this debate has been rich in rhetoric, considering that much of this research is predicated upon the assumption that data from this research is vital to clinical decision-making, it is ironic that researchers have introduced little data into these discussions. Using some published research concerning the use of placebo-controls in clinical research in hypertension and psychiatric drug trials, I suggest some ways that such data (...) might be incorporated into the ethical analysis concerning placebo use in clinical trials. This approach promises to be important for enhancing conceptual and scientific understanding as well as public policy decision-making. (shrink)