1. Center of Expertise in Palliative Care Utrecht, Julius Center for Health Sciences and Primary Care, Department of General Practice, University Medical Center Utrecht, Utrecht, The Netherlands
2. Academic Hospice Demeter, De Bilt, The Netherlands
3. Leidsche Rijn Julius Healthcare Center, Parkwijk, Utrecht, The Netherlands
4. Department of Medical Oncology, Erasmus Medical Center Cancer Institute, Rotterdam, The Netherlands