title: Seronegative polyarthritis: a unified concept.
mesh_terms: D000328:Adult; D001168:Arthritis / Q000145:classification* / Q000150:complications / Q000175:diagnosis / Q000235:genetics; D001171:Arthritis, Juvenile / Q000145:classification / Q000150:complications / Q000175:diagnosis; D016918:Arthritis, Reactive / Q000150:complications; D001172:Arthritis, Rheumatoid / Q000145:classification / Q000150:complications / Q000175:diagnosis; D001528:Behcet Syndrome / Q000150:complications; D002648:Child; D003093:Colitis, Ulcerative / Q000150:complications; D003424:Crohn Disease / Q000150:complications; D004200:Diseases in Twins; D005260:Female; D006680:HLA Antigens / Q000032:analysis; D006801:Humans; D008297:Male; D008875:Middle Aged; D009928:Organ Specificity; D010375:Pedigree; D011565:Psoriasis / Q000150:complications*; D012217:Rheumatoid Factor / Q000032:analysis; D013167:Spondylitis, Ankylosing / Q000150:complications; D008061:Whipple Disease / Q000150:complications
chemical_list: D006680:HLA Antigens; D012217:Rheumatoid Factor