title: [Three-step ladder drug therapy in the treatment of cancer pain].
authors.forename: Y K
authors.initials: YK
authors.lastname: Han
authors.forename: J H
authors.initials: JH
authors.lastname: Wu
mesh_terms: D006801:Humans; D009369:Neoplasms / Q000451:nursing / Q000503:physiopathology*; D010146:Pain / Q000188:drug therapy* / Q000451:nursing