1. Department of Health Promotion, Maastricht University, P.O. Box 616, 6200 MD Maastricht, The Netherlands
2. NUTRIM, School for Nutrition, Toxicology and Metabolism, Maastricht University, P.O. Box 616, 6200 MD Maastricht, The Netherlands
3. Academic Collaborative Centre of Public Health Limburg, South Limburg Regional Public Health Service, P.O. Box 2022, 6160 HA Geleen, The Netherlands
4. CAPHRI, School of Public Health and Primary Care, Maastricht University, P.O. Box 616, 6200 MD Maastricht, The Netherlands