[Rheumatic reactions in the aged].
D000368:Aged; D000375:Aging; D001172:Arthritis, Rheumatoid / Q000097:blood; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D012217:Rheumatoid Factor / Q000032:analysis*
D012217:Rheumatoid Factor