Soltani Mohammadi S, Gholamhosseinzadeh Tabasi Z. Comparing Ondansetron with Ondansetron-Dexamethasone Combination on Postoperative Nausea and Vomiting after Elective Abdominal Surgeries: A Randomized Double Blinded Clinical Trial. Arch Anesth & Crit Care. 2018;4(2):444-447.