1 Center for Psychopharmacology, Diakonhjemmet Hospital, Oslo, Norway; Experimental and Clinical Pharmacology, Institute of Medical Biology, UiT The Arctic University of Norway, Tromso, Norway. Electronic address: erik.sveberg.dietrichs@uit.no.
2 Department of Neurology, Oslo University Hospital, Oslo, Norway; Institute of Clinical medicine, University of Oslo, Oslo, Norway.