Letter: HL-A antigens and ankylosing spondylitis.
D001782:Blood Donors; D005260:Female; D006680:HLA Antigens; D006649:Histocompatibility Antigens; D006801:Humans; D007198:Indians, North American; D008297:Male; D013167:Spondylitis, Ankylosing / Q000235:genetics / Q000276:immunology*
D006680:HLA Antigens; D006649:Histocompatibility Antigens