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The original article by Daniel Mellifont, Jamie Peetz, and Mark Sayers, published in the Journal of Bioethical Inquiry 9(3): 369–370, can be located at DOI 10.1007/s11673-012-9386-7.
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Clacy, A., Sharman, R. & Lovell, G. Return-to-Play Confusion: Considerations for Sport-Related Concussion. Bioethical Inquiry 10, 127–128 (2013). https://doi.org/10.1007/s11673-012-9421-8
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DOI: https://doi.org/10.1007/s11673-012-9421-8