?:authorAffiliation
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[\'Department of Neurology, Akershus University Hospital, PO Box 1000, 1478, Lørenskog, Norway. e.s.kristoffersen@medisin.uio.no.\', \'Department of General Practice, University of Oslo, Oslo, Norway. e.s.kristoffersen@medisin.uio.no.\', \'Department of Neurology, Akershus University Hospital, PO Box 1000, 1478, Lørenskog, Norway.\', \'Institute of Clinical Medicine, University of Oslo, Oslo, Norway.\']
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