1. Faculty of Health, Medicine and Life Sciences, Maastricht University , P.O. Box 616, 6200 MD, Maastricht , The Netherlands
2. Department of Knowledge and Innovation, Public Health Services South Limburg (GGD Zuid Limburg) , P.O. Box 33, 6400 AA, Heerlen , The Netherlands
3. Department of Health Services Research, Care and Public Health Research Institute, Maastricht University , P.O. Box 616, 6200 MD, Maastricht , The Netherlands
4. Department of Health Policy and Research, Public Health Services Flevoland (GGD Flevoland) , P.O. Box 1120, 8200 BC Lelystad , The Netherlands