1. Department of Public and Occupational Health Amsterdam Public Health Research Institute Amsterdam UMC Vrije Universiteit Amsterdam Amsterdam The Netherlands
2. Department of Public Health Aarhus University Aarhus C Denmark
3. DEFACTUM Social & Health Services and Labour Market Aarhus C Denmark
4. Department of Health Sciences, Community and Occupational Medicine University Medical Center GroningenUniversity of Groningen Groningen The Netherlands
5. Department of Research and Development Netherlands Comprehensive Cancer Organisation (IKNL) Utrecht The Netherlands