Ankylosing spondylitis -- a clue to the cause.
D001168:Arthritis / Q000150:complications*; D005260:Female; D006680:HLA Antigens / Q000302:isolation & purification; D006801:Humans; D007109:Immunity; D008297:Male; D013167:Spondylitis, Ankylosing / Q000209:etiology* / Q000276:immunology
D006680:HLA Antigens