title: HL-A (transplantation) antigens in ankylosing spondylitis and Crohn's disease.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D003424:Crohn Disease / Q000235:genetics / Q000276:immunology*; D005260:Female; D005787:Gene Frequency; D006649:Histocompatibility Antigens; D006650:Histocompatibility Testing; D006801:Humans; D008297:Male; D008875:Middle Aged; D011379:Prognosis; D013167:Spondylitis, Ankylosing / Q000235:genetics / Q000276:immunology*
chemical_list: D006649:Histocompatibility Antigens