GEOGRAPHIC AND CLIMATIC ASPECTS OF MULTIPLE SCLEROSIS; A REVIEW OF CURRENT HYPOTHESES.
D002170:Canada; D002980:Climate; D004813:Epidemiology; D005843:Geography; D006801:Humans; D009103:Multiple Sclerosis; D014481:United States
CANADA; CLIMATE; EPIDEMIOLOGY; GEOGRAPHY; MULTIPLE SCLEROSIS; UNITED STATES