1. Department of Neuromedicine and Movement Science, Faculty of Medicine and Health Sciences, Norwegian University of Science and Technology (NTNU), Trondheim, Norway
2. Department of Medicine, Vestre Viken Hospital Trust, Ringerike Hospital, Hønefoss, Norway
3. Department of Neurosurgery, St. Olavs Hospital, Trondheim University Hospital, Trondheim, Norway
4. Department of Radiology, Nord-Trøndelag Hospital Trust, Levanger Hospital, Levanger, Norway
5. Department of Radiology, Vestre Viken Hospital Trust, Drammen Hospital, Drammen, Norway