1. Department of Epidemiology; CAPHRI School for Public Health and Primary Care; Maastricht University; Maastricht The Netherlands
2. Department of Environmental Health; Public Health Service South Limburg; Geleen The Netherlands
3. Department of Youth Health Care; Public Health Service South Limburg; Geleen The Netherlands
4. Department of Research and Development; Public Health Service South Limburg; Geleen The Netherlands
5. Department of Social Medicine; CAPHRI School for Public Health and Primary Care; Maastricht University; Maastricht The Netherlands
6. Department of General Practice; CAPHRI School for Public Health and Primary Care; Maastricht University; Maastricht The Netherlands