Letter: Rheumatoid disease.
D000328:Adult; D016918:Arthritis, Reactive / Q000276:immunology; D001172:Arthritis, Rheumatoid; D006680:HLA Antigens; D006801:Humans; D008297:Male; D012217:Rheumatoid Factor / Q000032:analysis
D006680:HLA Antigens; D012217:Rheumatoid Factor