- Received November 9, 2016.
- Revision received December 22, 2016.
- Revision received April 11, 2017.
- Accepted January 24, 2017.
- Published online April 11, 2017.
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© British Journal of General Practice 2017
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- Matthias Michiels-Corsten, MD, GP, Research fellow
- Stefan Bösner, MD, MPH, GP, Associate professor for general practice
- Norbert Donner-Banzhoff, MD, MHSc, GP, Professor for general practice
- Department of General Practice/Family Medicine, Faculty of Medicine, University of Marburg, Marburg, Germany.
- Address for correspondence
Matthias Michiels-Corsten, Department of General Practice/Family Medicine/Allgemeinmedizin, University of Marburg, Karl-von-Frisch-Str. 4, D-35043 Marburg, Germany. E-mail: