- Correspondence to Ivo K Joore, Department of General Practice, Division of Clinical Methods and Public Health, Academic Medical Center, Meibergdreef 9, Amsterdam 1100 DE, The Netherlands;
- Received March 4, 2015
- Revised May 29, 2015
- Accepted June 13, 2015
- First published June 30, 2015.
Abstract in Dutch
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- Abstract in Dutch - Online abstract
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