High prevalence of rheumatoid arthritis in Yakima Indians.
D000328:Adult; D000367:Age Factors; D000368:Aged; D000372:Agglutination Tests; D000818:Animals; D001172:Arthritis, Rheumatoid / Q000097:blood / Q000175:diagnosis / Q000453:epidemiology*; D005260:Female; D005428:Flocculation Tests; D006306:Health Surveys; D006801:Humans; D007198:Indians, North American; D008875:Middle Aged; D012756:Sheep; D014861:Washington