1. Department of Neurology; University Clinical Centre Ljubljana; Ljubljana Slovenia
2. Sobell Department of Motor Neuroscience and Movement Disorders; Institute of Neurology; University College London; London UK
3. Department of Community Medicine and Rehabilitation; Umeå University; Umeå Sweden
4. Department of Public Health and Clinical Medicine; Family Medicine; Umeå University; Umeå Sweden
5. Department of Pharmacology and Clinical Neuroscience; Umeå University; Umeå Sweden