1. Academic Collaborative Centre for Public Health Brabant, Department Tranzo; Tilburg University; Tilburg the Netherlands
2. National Institute for Public Health and the Environment (RIVM); Bilthoven the Netherlands
3. Academic Collaborative Centre for Public Health Limburg, Public Health Service South Limburg (GGD ZL); Geleen in Heerlen the Netherlands
4. Department of Health Services Research, Care and Public Health Research Institute CAPHRI; Maastricht University; Maastricht the Netherlands