title: HLA antigens in recurrent oral ulceration.
mesh_terms: D006649:Histocompatibility Antigens; D006801:Humans; D009059:Mouth Diseases / Q000235:genetics / Q000276:immunology*; D012008:Recurrence; D014456:Ulcer / Q000235:genetics / Q000276:immunology*
chemical_list: D006649:Histocompatibility Antigens