Affiliation: | 1. Department of Neurology and Clinical Neurophysiology, St. Olavs Hospital, Trondheim, Norway;2. Department of Neuromedicine and Movement Science, Norwegian University of Science and Technology, Trondheim, Norway;3. Department of Dermatology, St. Olavs Hospital, Trondheim, Norway;4. Department of Clinical Chemistry and Pharmacology, Division of Laboratory Medicine, Lund, Sweden |