Shariat Moharari R, Hadavi M, Pourfakhr P, Najafi A, Etezadi F, Khajavi MR. Evaluation of the Postoperative Analgesic Efficacy of Intraperitoneal Ketamine Compared with Bupivacaine in Laparoscopic Cholecystectomy. Arch Anesth & Crit Care. 2016;2(1):146-149.