Further considerations on the geographic distribution of multiple sclerosis.
D000293:Adolescent; D000328:Adult; D002648:Child; D002675:Child, Preschool; D003718:Denmark; D004777:Environment; D005387:Finland; D006801:Humans; D009103:Multiple Sclerosis / Q000453:epidemiology*; D009426:Netherlands; D009664:Norway; D013223:Statistics as Topic; D013548:Sweden