References in:
Chronic care management for patients with COPD: a critical review of available evidence
Karin M. M. Lemmens, Lidwien C. Lemmens, José H. C. Boom, Hanneke W. Drewes, Jolanda A. C. Meeuwissen, Lotte M. G. Steuten, Hubertus J. M. Vrijhoef & Caroline A. Baan
Journal of Evaluation in Clinical Practice 19 (5):734-752 (2012)