1. Pain and Palliation Research Group and Department of Cancer Research and Molecular Medicine, Faculty of Medicine, NTNU, Trondheim University Hospital, Trondheim,
2. Pain and Palliation Research Group and Department of Cancer Research and Molecular Medicine, Faculty of Medicine, NTNU, Trondheim University Hospital, Trondheim; Division of Cancer Medicine and Radiotherapy, Rikshospitalet University Hospital, Oslo; The Cancer Center, Ullevål University Hospital, Oslo
3. Division of Palliative Care Medicine, University of Alberta, Edmonton, Alberta
4. Palliative Care Unit, Fondazione IRCCS, Istituto Nazionale Dei Tumori, Milano
5. Pain and Palliation Research Group and Department of Cancer Research and Molecular Medicine, Faculty of Medicine, NTNU, Trondheim University Hospital, Trondheim; Department of Anaesthesiology and Emergency Medicine, Intensive Care Unit, St. Olav University Hospital, Trondheim
6. Cancer Unit, Department of Internal Medicine, Innlandet Hospital Trust, Gjøvik
7. Pain and Palliation Research Group and Department of Cancer Research and Molecular Medicine, Faculty of Medicine, NTNU, Trondheim University Hospital, Trondheim; The Cancer Center, Ullevål University Hospital, Oslo
8. Pain and Palliation Research Group and Department of Cancer Research and Molecular Medicine, Faculty of Medicine, NTNU, Trondheim University Hospital, Trondheim; Palliative Medicine Unit, Department of Oncology, Trondheim University Hospital, Trondheim