The epidemiology of rheumatoid arthritis.
D000328:Adult; D000367:Age Factors; D000368:Aged; D001172:Arthritis, Rheumatoid / Q000175:diagnosis / Q000000981:diagnostic imaging / Q000453:epidemiology* / Q000209:etiology / Q000235:genetics; D044383:Black People; D002980:Climate; D003710:Demography; D005006:Ethnicity; D005260:Female; D006801:Humans; D007198:Indians, North American; D008297:Male; D008875:Middle Aged; D008906:Mining; D009784:Occupational Diseases / Q000453:epidemiology; D009790:Occupations; D011859:Radiography; D012217:Rheumatoid Factor / Q000032:analysis; D012959:Socioeconomic Factors; D044465:White People
D012217:Rheumatoid Factor