Parra-Güiza, R., H. J. Meléndez, and M. E. Ochoa. “Prophylactic Efficacy of Ondansetron and Dexamethasone in Nausea and Vomit in Patients Undergoing Cesarean Section With Neuraxial Opioids. Controlled Clinical Trial”. Médicas UIS, vol. 31, no. 1, Apr. 2018, pp. 31-38, doi:10.18273/revmed.v31n1-2018004.