title: Not yet standard: retinoids versus second primary tumors.
authors.forename: S M
authors.initials: SM
authors.lastname: Lippman
authors.forename: W K
authors.initials: WK
authors.lastname: Hong
mesh_terms: D016588:Anticarcinogenic Agents / Q000627:therapeutic use*; D006258:Head and Neck Neoplasms / Q000188:drug therapy*; D006801:Humans; D008175:Lung Neoplasms / Q000188:drug therapy*; D016609:Neoplasms, Second Primary / Q000517:prevention & control*; D012176:Retinoids / Q000627:therapeutic use*
chemical_list: D016588:Anticarcinogenic Agents; D012176:Retinoids