Multiple sclerosis. A cluster in a small Northwestern United States community.
D003241:Consanguinity; D004196:Disease Outbreaks / Q000453:epidemiology*; D004200:Diseases in Twins; D004777:Environment; D005191:Family Characteristics; D005260:Female; D006801:Humans; D008297:Male; D009103:Multiple Sclerosis / Q000453:epidemiology* / Q000235:genetics; D010375:Pedigree; D012899:Smallpox / Q000150:complications; D011795:Surveys and Questionnaires; D013997:Time Factors; D014861:Washington; D014881:Water Supply