title: Unusual serum protein components in rheumatoid arthritis and their relations to systemic vasculitis.
mesh_terms: D000328:Adult; D000368:Aged; D001167:Arteritis / Q000097:blood* / Q000209:etiology; D001172:Arthritis, Rheumatoid / Q000097:blood* / Q000150:complications; D001798:Blood Proteins / Q000032:analysis*; D003165:Complement System Proteins / Q000032:analysis; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D012217:Rheumatoid Factor / Q000032:analysis
chemical_list: D001798:Blood Proteins; D003165:Complement System Proteins; D012217:Rheumatoid Factor