title: WHO analgesic ladder and chronic pain: the need to search for treatable causes.
authors: Charing Cross Hospital, Imperial College NHS Healthcare Trust, London W6 8RF, UK.
authors: Roberto J
authors: RJ
authors: Guiloff
authors: Royal Free London NHS Foundation Trust and University College London, London NW3 2QG, UK.
authors: Heather
authors: H
authors: Angus-Leppan
mesh_terms: D000700:Analgesics / Q000627:therapeutic use*; D059350:Chronic Pain / Q000517:prevention & control*; D006801:Humans
chemical_list: D000700:Analgesics