Blood-groups and hypopharyngeal cancer.
D000017:ABO Blood-Group System; D002294:Carcinoma, Squamous Cell / Q000453:epidemiology*; D004739:England; D005260:Female; D006801:Humans; D008297:Male; D010610:Pharyngeal Neoplasms / Q000453:epidemiology*
D000017:ABO Blood-Group System