1. Department of Public and Occupational Health & Expertise Center Palliative Care VUmc, EMGO Institute for Health and Care Research, VU University Medical Center (VUmc), Amsterdam, The Netherlands
2. Department of General Practice, EMGO Institute for Health and Care Research, VU University Medical Center, Amsterdam, The Netherlands
3. Netherlands Institute for Health Services Research, NIVEL, Utrecht, The Netherlands
4. End-of-life Care Research Group, Ghent University & Vrije Universiteit Brussel, Brussels, Belgium