title: Current challenges in cancer pain management: does the WHO ladder approach still have relevance?
authors.forename: Allen W
authors.initials: AW
authors.lastname: Burton
authors.forename: Basem
authors.initials: B
authors.lastname: Hamid
mesh_terms: D000700:Analgesics / Q000627:therapeutic use; D006801:Humans; D009369:Neoplasms / Q000150:complications*; D010146:Pain / Q000188:drug therapy* / Q000209:etiology; D017410:Practice Guidelines as Topic; D014944:World Health Organization
chemical_list: D000700:Analgesics