title: Ankylosing spondylitis and HLA-B27 in Punjabis.
mesh_terms: D005260:Female; D006680:HLA Antigens / Q000302:isolation & purification*; D006649:Histocompatibility Antigens / Q000302:isolation & purification*; D006801:Humans; D007194:India; D008297:Male; D013167:Spondylitis, Ankylosing / Q000276:immunology*
chemical_list: D006680:HLA Antigens; D006649:Histocompatibility Antigens