1. Regional Advisory Unit for Palliative Care, Department of Oncology, Oslo University Hospital (OUH), Oslo, Norway
2. European Palliative Care Research Centre (PRC), Dept. of Oncology, OUH, Norway and Institute of Clinical Medicine, University of Oslo, Oslo, Norway
3. Department of Oncology, Oslo University Hospital, Oslo, Norway
4. Institute of Clinical Medicine, University of Oslo, Oslo, Norway
5. Department of Public Health and Nursing, Faculty of Medicine and Health Sciences, NTNU, Norwegian University of Science and Technology, Trondheim, Norway
6. Department of Medical Physics, Oslo University Hospital, Oslo, Norway
7. Department of Physics, University of Oslo, Oslo, Norway
8. Faculty of Health Sciences, Oslo Metropolitan University, Oslo, Norway