title: Tramadol or ketamine for caudal analgesia?
authors.forename: M
authors.initials: M
authors.lastname: Zenz
authors.forename: D
authors.initials: D
authors.lastname: Zenner
mesh_terms: D015360:Analgesia, Epidural / Q000379:methods*; D000701:Analgesics, Opioid / Q000627:therapeutic use; D000778:Anesthetics, Dissociative / Q000627:therapeutic use; D002648:Child; D002675:Child, Preschool; D004992:Ethics, Medical; D006801:Humans; D007649:Ketamine / Q000627:therapeutic use; D010149:Postoperative Pain / Q000188:drug therapy*; D014147:Tramadol / Q000627:therapeutic use
chemical_list: D000701:Analgesics, Opioid; D000778:Anesthetics, Dissociative; D014147:Tramadol; D007649:Ketamine