Letter: Epidemiological aspects of choriocarcinoma.
D000017:ABO Blood-Group System; D002822:Choriocarcinoma / Q000453:epidemiology*; D005260:Female; D006680:HLA Antigens; D006801:Humans; D006828:Hydatidiform Mole / Q000453:epidemiology; D011247:Pregnancy; D012846:Singapore
D000017:ABO Blood-Group System; D006680:HLA Antigens