1. Faculty of Medicine and Health Sciences, Norwegian University of Science and Technology, 7491 Trondheim, Norway
2. Department of Clinical Services, St. Olav’s University Hospital, 7006 Trondheim, Norway
3. Institute of Neuromedicine and Movement Science, Norwegian University of Science and Technology, 7491 Trondheim, Norway
4. Department of Neurology and Neurophysiology, St. Olav’s University Hospital, 7006 Trondheim, Norway