| Affiliation: | 1. Pain and Palliation Research Group, Department of Circulation and Medical Imaging, Faculty of Medicine, Norwegian University of Science and Technology, Trondheim, Norway;2. National Competence Centre for Complex Symptom Disorders, Department of Pain and Complex Disorders, St. Olav University Hospital, Trondheim, Norway;3. Centre of Palliative Medicine, Surgical Division, Akershus University Hospital, Lørenskog, Norway;4. Department of Pharmacoepidemiology, Division of Epidemiology, The Norwegian Institute of Public Health, Oslo, Norway;5. Norwegian Centre for Addiction Research, University of Oslo, Oslo, Norway;6. Department of Emergency Medicine, St. Olav University Hospital, Trondheim, Norway;g Department of Public Health and General Practice, Faculty of Medicine, Norwegian University of Science and Technology, Trondheim, Norway |
