1. University Center for Palliative Care, Department of Oncology, Inselspital, University Hospital Bern, SWAN C518, Freiburgstrasse, 3010 Bern, Switzerland
2. Department of Health Services Research, Care and Public Health Research Institute (CAPHRI), Maastricht University, Maastricht, The Netherlands
3. University Center for Palliative Care, Department of Oncology, Inselspital, University Hospital Bern, Bern, Switzerland