title: [Clinical observation of patient-controlled analgesia for postoperative pain: a report of 20 cases].
authors.forename: H
authors.initials: H
authors.lastname: Xu
authors.forename: J B
authors.initials: JB
authors.lastname: Wang
authors.forename: Q L
authors.initials: QL
authors.lastname: Lu
mesh_terms: D016058:Analgesia, Patient-Controlled / Q000592:standards*; D006801:Humans; D009730:Nursing Assessment; D010147:Pain Measurement; D010149:Postoperative Pain / Q000188:drug therapy* / Q000451:nursing; D016896:Treatment Outcome