title: Trials of postoperative antiemetics need three arms.
authors: N W
authors: NW
authors: Goodman
mesh_terms: D000932:Antiemetics / Q000627:therapeutic use*; D002986:Clinical Trials as Topic / Q000379:methods; D004329:Droperidol / Q000627:therapeutic use; D006801:Humans; D011182:Postoperative Care
chemical_list: D000932:Antiemetics; D004329:Droperidol