Multiple sclerosis in northern Norway.
D000293:Adolescent; D000328:Adult; D002648:Child; D002980:Climate; D004185:Disability Evaluation; D005247:Feeding Behavior; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009103:Multiple Sclerosis / Q000175:diagnosis / Q000453:epidemiology* / Q000235:genetics; D009664:Norway