The prevalence of rheumatoid arthritis in occupational groups.
D000293:Adolescent; D000328:Adult; D000368:Aged; D001172:Arthritis, Rheumatoid / Q000175:diagnosis / Q000453:epidemiology*; D002648:Child; D005260:Female; D006801:Humans; D008297:Male; D008403:Mass Screening; D008875:Middle Aged; D009790:Occupations; D013312:Stress, Physiological; D013548:Sweden