title: Background infusion and PCA.
authors.forename: P
authors.initials: P
authors.lastname: Gaukroger
authors.forename: D
authors.initials: D
authors.lastname: Tomkins
authors.forename: J
authors.initials: J
authors.lastname: van der Walt
mesh_terms: D016058:Analgesia, Patient-Controlled; D000701:Analgesics, Opioid / Q000008:administration & dosage*; D006801:Humans
chemical_list: D000701:Analgesics, Opioid