1. DOLS, University Center for Palliative Care, University Hospital Inselspital Bern, Bern, Switzerland
2. Department of Health Services Research, School CAPHRI, Care and Public Health Research Institute, Maastricht University, Maastricht, The Netherlands
3. Department of Family Medicine, School CAPHRI, Care and Public Health Research Institute, Maastricht University, Maastricht, The Netherlands
4. School of Nursing, The University of Alabama at Birmingham, Birmingham, AL, USA
5. Institute of Nursing Science, University of Graz, Graz, Austria