- Correspondence to Jeroen de Wilde, Department of Youth Health Care, Municipal Health Service The Hague (GGD Den Haag), PO Box 12652, The Hague 2500 DP, The Netherlands;
- Received April 10, 2013
- Revised July 17, 2013
- Accepted September 23, 2013
- First published October 16, 2013.
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