- Correspondence to Joana Kist-van Holthe, Department of Public and Occupational Health and the EMGO Institute for Health and Care Research, VU University Medical Center, van der Boechorststraat 7, Amsterdam 1081BT, The Netherlands;
- Received September 8, 2015
- Accepted October 15, 2015
- First published November 5, 2015.
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