title: Hard lessons for pain researchers.
authors.forename: G M
authors.initials: GM
authors.lastname: Knox
authors.forename: A F
authors.initials: AF
authors.lastname: Merry
authors.forename: C
authors.initials: C
authors.lastname: Frampton
authors.forename: B J
authors.initials: BJ
authors.lastname: Anderson
mesh_terms: D018712:Analgesics, Non-Narcotic / Q000627:therapeutic use*; D004359:Drug Therapy, Combination; D006801:Humans; D010149:Postoperative Pain / Q000517:prevention & control*; D012107:Research Design; D018401:Sample Size
chemical_list: D018712:Analgesics, Non-Narcotic