title: Letter: HLA antigens in ulcerative colitis.
mesh_terms: D003093:Colitis, Ulcerative / Q000276:immunology*; D006680:HLA Antigens / Q000302:isolation & purification*; D006649:Histocompatibility Antigens / Q000302:isolation & purification*; D006801:Humans; D007557:Israel
chemical_list: D006680:HLA Antigens; D006649:Histocompatibility Antigens