“Comparing the Efficacy of Dexmedetomidine, Dexamethasone, and Metoclopramide in Postoperative Nausea and Vomiting of Tympanomastoidectomy Surgery: A Double‑Blind Randomized Clinical Trial”. 2019. Journal of Pharmaceutical Negative Results 10 (1): 57-62. https://www.pnrjournal.com/index.php/home/article/view/141.