title: The selenium dilemma.
mesh_terms: D000820:Animal Diseases; D000821:Animal Feed; D000824:Animal Nutritional Physiological Phenomena; D000818:Animals; D000970:Antineoplastic Agents; D002273:Carcinogens; D003677:Deficiency Diseases / Q000662:veterinary; D004305:Dose-Response Relationship, Drug; D005260:Female; D006801:Humans; D007880:Legislation, Drug; D008297:Male; D009369:Neoplasms / Q000209:etiology / Q000401:mortality; D009747:Nutritional Physiological Phenomena; D009751:Nutritional Requirements; D011200:Poultry; D011201:Poultry Diseases; D011247:Pregnancy; D012643:Selenium / Q000378:metabolism / Q000627:therapeutic use / Q000633:toxicity; D014481:United States; D014811:Vitamin E Deficiency / Q000188:drug therapy
chemical_list: D000970:Antineoplastic Agents; D002273:Carcinogens; D012643:Selenium