title: HL-A antigens and choriocarcinoma.
mesh_terms: D000941:Antigens; D002822:Choriocarcinoma / Q000276:immunology*; D005260:Female; D006648:Histocompatibility; D006801:Humans; D008214:Lymphocytes / Q000276:immunology; D010920:Placenta / Q000276:immunology; D011247:Pregnancy; D012703:Serotyping
chemical_list: D000941:Antigens