1. Division of Anatomy, Department of Molecular Medicine, Institute of Basic Medical Sciences, University of Oslo, Oslo NO-0317, Norway
2. Department of Neurology, Akershus University Hospital, Lørenskog N-1478, Norway
3. Department of Pharmaceutical Biosciences, Institute of Pharmacy, University of Oslo, Oslo NO-0317, Norway
4. Department of Neurology and Johns Hopkins Drug Discovery, John Hopkins School of Medicine, Baltimore, MD, 21205, USA
5. Department of Neurology, Oslo University Hospital, Rikshospitalet, Oslo N-0424, Norway
6. Department of Neurology, Institute of Clinical Medicine, University of Oslo, Oslo NO-0317, Norway