title: Intensity of Chronic Pain.
authors.forename: Jane C
authors.initials: JC
authors.lastname: Ballantyne
authors.forename: Mark D
authors.initials: MD
authors.lastname: Sullivan
mesh_terms: D000701:Analgesics, Opioid / Q000627:therapeutic use*; D059350:Chronic Pain / Q000145:classification*; D006801:Humans; D010147:Pain Measurement
chemical_list: D000701:Analgesics, Opioid