title: Heroin and morphine in advanced cancer.
mesh_terms: D003932:Heroin / Q000008:administration & dosage*; D006801:Humans; D009020:Morphine / Q000008:administration & dosage*; D009369:Neoplasms / Q000503:physiopathology*; D010148:Intractable Pain / Q000188:drug therapy*
chemical_list: D003932:Heroin; D009020:Morphine