Better methods for meta-analysis available.
Pace
Nathan L
NL
D015360:Analgesia, Epidural; D016058:Analgesia, Patient-Controlled; D000701:Analgesics, Opioid / Q000008:administration & dosage*; D006801:Humans; D015201:Meta-Analysis as Topic; D010149:Postoperative Pain / Q000188:drug therapy*
D000701:Analgesics, Opioid