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| Methods | Randomized controlled trial |
| Participants | Patients undergoing thyroidectomy without lymph node dissection, 18 to 70 years of age, ASA I to III, Apfel score equal to 2 |
| Interventions | Ondansetron (4 mg) after induction of anaesthesia or droperidol (1.25 mg) after induction of anaesthesia or dexamethasone (4 mg) after induction of anaesthesia |
| Outcomes | Pain, PONV |
| Notes | Study status (completed), first posted (2012), missing information (anaesthesia regimen) |
