title: Chemoprevention of lung cancer is proving difficult and frustrating, requiring new approaches.
authors.forename: G S
authors.initials: GS
authors.lastname: Omenn
mesh_terms: D000111:Acetylcysteine / Q000627:therapeutic use; D016588:Anticarcinogenic Agents / Q000627:therapeutic use*; D002273:Carcinogens / Q000009:adverse effects; D004224:Diterpenes; D020719:Glucuronides / Q000378:metabolism; D005978:Glutathione / Q000378:metabolism; D006801:Humans; D008175:Lung Neoplasms / Q000139:chemically induced / Q000378:metabolism* / Q000517:prevention & control*; D016032:Randomized Controlled Trials as Topic; D000084562:Retinyl Esters; D014801:Vitamin A / Q000031:analogs & derivatives / Q000627:therapeutic use; D019207:beta Carotene / Q000009:adverse effects
chemical_list: D016588:Anticarcinogenic Agents; D002273:Carcinogens; D004224:Diterpenes; D020719:Glucuronides; D000084562:Retinyl Esters; D019207:beta Carotene; D014801:Vitamin A; C014794:retinol palmitate; D005978:Glutathione; D000111:Acetylcysteine