Seronegative spondarthritis.
D001168:Arthritis / Q000175:diagnosis* / Q000276:immunology; D006680:HLA Antigens / Q000032:analysis; D006801:Humans; D013122:Spinal Diseases / Q000175:diagnosis* / Q000276:immunology; D013167:Spondylitis, Ankylosing / Q000175:diagnosis
D006680:HLA Antigens