Adra, L., T. Ibrahim, and B. ALaji. “The Efficacy of Dexamethasone in the Prevention of Postoperative Nausea and Vomiting After Laparoscopic Cholecystectomy”. Tishreen University Journal -Medical Sciences Series, vol. 39, no. 3, Sept. 2018, https://journal.tishreen.edu.sy/index.php/hlthscnc/article/view/3884.