title: Discussion of risk factors for nasopharyngeal carcinoma.
mesh_terms: D000393:Air Pollutants; D002273:Carcinogens; D002277:Carcinoma / Q000139:chemically induced / Q000209:etiology*; D002681:China / Q000208:ethnology; D004427:Ear Diseases / Q000150:complications; D004777:Environment; D005502:Food; D006801:Humans; D009303:Nasopharyngeal Neoplasms / Q000139:chemically induced / Q000209:etiology*; D009602:Nitrosamines / Q000009:adverse effects; D009668:Nose Diseases / Q000150:complications; D012306:Risk; D012906:Smoke
chemical_list: D000393:Air Pollutants; D002273:Carcinogens; D009602:Nitrosamines; D012906:Smoke