title: Letter: Ascorbic acid and nitrosamines.
mesh_terms: D000818:Animals; D001205:Ascorbic Acid / Q000494:pharmacology*; D002273:Carcinogens / Q000037:antagonists & inhibitors; D002471:Cell Transformation, Neoplastic / Q000187:drug effects; D051379:Mice; D009602:Nitrosamines / Q000037:antagonists & inhibitors* / Q000494:pharmacology
chemical_list: D002273:Carcinogens; D009602:Nitrosamines; D001205:Ascorbic Acid