title: Idiopathic retroperitoneal fibrosis and HLA-B27.
mesh_terms: D000569:Americas; D006680:HLA Antigens / Q000032:analysis*; D006801:Humans; D044469:Racial Groups; D012185:Retroperitoneal Fibrosis / Q000175:diagnosis / Q000276:immunology*
chemical_list: D006680:HLA Antigens