Chaparro Gómez L. E.; Rivera M. F.; Gallo T.; González N. J. Haloperidol plus dexamethasone versus dexamethasone alone to prevent postoperative nausea and vomiting in patients undergoing ambulatory surgery: a randomized, controlled and double-blind study. Iatreia, v. 21, n. 1-S, p. pág. S-10, 1 feb. 2008.