title: Retrospective study on nasopharyngeal carcinoma.
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D002648:Child; D002675:Child, Preschool; D004777:Environment; D005006:Ethnicity; D005191:Family Characteristics; D005260:Female; D005843:Geography; D006801:Humans; D007223:Infant; D008297:Male; D008875:Middle Aged; D009303:Nasopharyngeal Neoplasms / Q000453:epidemiology* / Q000209:etiology; D009671:Nostrums; D012189:Retrospective Studies; D012737:Sex Factors; D012907:Smoking; D012959:Socioeconomic Factors; D013624:Taiwan; D014691:Ventilation
chemical_list: D009671:Nostrums