1. European Palliative Care Research Centre (PRC), Department of Oncology, Oslo University Hospital, Institute of Clinical Medicine, University of Oslo, 4956 Oslo, Norway
2. Department of Public Health and Nursing, Norwegian University of Science and Technology, 7034 Trondheim, Norway
3. Department of Neurosurgery, St. Olavs University Hospital, 7030 Trondheim, Norway
4. Department of Neurosurgery, Karolinska University Hospital, 17164 Stockholm, Sweden
5. Department of Clinical Neuroscience, Karolinska Institutet, 17177 Stockholm, Sweden
6. Department of Neuromedicine and Movement Science, Norwegian University of Science and Technology, 7034 Trondheim, Norway
7. Institute of Clinical Medicine, University of Oslo, 0318 Oslo, Norway
8. Vilhelm Magnus Laboratory, Department of Neurosurgery, Oslo University Hospital, 0372 Oslo, Norway