TY - GEN AU - Little,H TI - The natural history of ankylosing spondylitis SN - 0315-162X PY - 1988///1220 KW - Adolescent KW - Adult KW - Back Pain KW - etiology KW - Child KW - HLA-B Antigens KW - analysis KW - HLA-B27 Antigen KW - Hip Prosthesis KW - Humans KW - Spondylitis, Ankylosing KW - immunology N1 - Publication Type: Editorial ER -