1. Julius Centre for Health Sciences and Primary Care, University Medical Centre Utrecht, Utrecht University, Heidelberglaan 100, 3584 CS Utrecht, The Netherlands
2. Department of General Practice, Amsterdam UMC, Amsterdam Public Health Research Institiute, Meibergdreef 9, 1105 AZ Amsterdam, The Netherlands
3. Department of General Practice, Care and Public Health Research Institute, Maastricht University, P. Debeyeplein 1, 6229 HA Maastricht, The Netherlands
4. Department of General Practice and Elderly Care Medicine, University Medical Centre Groningen, University of Groningen, 9700 AD Groningen, The Netherlands
5. IKNL—Department of Research and Development, Netherlands Comprehensive Cancer Organisation (IKNL), Godebaldkwartier 419, 3511 DT Utrecht, The Netherlands
6. Department of Health Technology and Services Research, Utrecht & Technical Medical Centre, Twente University, Technohal, Hallenweg 5, 7522 NH Enschede, The Netherlands