- Correspondence to Professor Birgitte Schoenmakers, Department of Public Health and Primary Care, Academic Centre of General Practice, KU Leuven-University of Leuven, Kapucijnenvoer 33, Box 7001, Leuven 3000, Belgium;
- Received July 28, 2015
- Revised January 10, 2016
- Accepted January 18, 2016
- First published February 5, 2016.
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