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| Methods | Randomized controlled trial |
| Participants | Patients scheduled for elective operation under general anaesthesia, female, 20 to 70 years of age, PCA |
| Interventions | Ondansetron (8 mg) 30 minutes before end of surgery or palonosetron (0.075 mg) 30 minutes before end of surgery |
| Outcomes | PONV, side effects, nausea |
| Notes | Study status (completed), first posted (2013), missing information (anaesthesia regimen) |
