1. Department of Neurology St. Olav's University Hospital Trondheim Norway
2. Department of Neuromedicine and Movement Science Norwegian University of Science and Technology Trondheim Norway
3. Department of Neurosurgery St. Olav's University Hospital Trondheim Norway
4. Department of Neurology Mayo Clinic Phoenix AZ USA
5. UCL Queen Square Institute of Neurology The National Hospital of Neurology and Neurosurgery London UK
6. Department of Radiology and Nuclear Medicine St. Olav's University Hospital Trondheim Norway
7. Department of Circulation and Medical Imaging Faculty of Medicine Norwegian University of Science and Technology Trondheim Norway