[Epidemiological study conducted in a rural district in Japan with special reference to the rheumatoid factor].
D000293:Adolescent; D000328:Adult; D000368:Aged; D001789:Blood Group Antigens; D001798:Blood Proteins / Q000032:analysis; D002648:Child; D002675:Child, Preschool; D004812:Epidemiologic Methods; D005260:Female; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D007564:Japan; D008297:Male; D008875:Middle Aged; D012217:Rheumatoid Factor / Q000032:analysis*; D012424:Rural Population; D005719:gamma-Globulins / Q000032:analysis
D001789:Blood Group Antigens; D001798:Blood Proteins; D005719:gamma-Globulins; D012217:Rheumatoid Factor