- Correspondence to Kayvan Bozorgmehr, Department of General Practice & Health Services Research, University Hospital Heidelberg, Heidelberg, Marsilius Arkaden, Turm West, 69120 Heidelberg, Germany;
- Received October 10, 2016
- Revised April 17, 2017
- Accepted May 5, 2017
- First published July 14, 2017.
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