Blood-groups and nasopharyngeal carcinoma.
D000017:ABO Blood-Group System; D044466:Asian People; D044383:Black People; D002681:China; D006801:Humans; D007630:Kenya; D009303:Nasopharyngeal Neoplasms / Q000453:epidemiology / Q000209:etiology*
D000017:ABO Blood-Group System