1. Department of General Practice, and EMGO+ Institute for Health and Care Research, VU University Medical Centre, The Netherlands
2. Department of Public and Occupational Health, and EMGO+ Institute for Health and Care Research, VU University Medical Centre, The Netherlands
3. Unit for Applied Clinical Research, Faculty of Medicine, Norwegian University of Science and Technology, Norway
4. Division of Psychosocial Research and Epidemiology, the Netherlands Cancer Institute, The Netherlands
5. Department of Public and Occupational Health, and EMGO+ Institute for Health and Care Research, VU University Medical Centre, The Netherlands, End-of-Life Care Research Group, Vrije Universiteit Brussel, Belgium