title: Caudal tramadol for postoperative analgesia in hypospadias surgery.
authors.forename: W
authors.initials: W
authors.lastname: Russell
mesh_terms: D000328:Adult; D000701:Analgesics, Opioid / Q000627:therapeutic use*; D000763:Anesthesia, Caudal; D002648:Child; D006801:Humans; D007021:Hypospadias / Q000601:surgery*; D008297:Male; D010149:Postoperative Pain / Q000517:prevention & control*; D014147:Tramadol / Q000627:therapeutic use*
chemical_list: D000701:Analgesics, Opioid; D014147:Tramadol