Hajigholam Saryazdi,H , , Shafa,A , and Nakhodaei,F . "Comparison between the Effect of Bupivacaine-Pethidine and Bupivacaine-Ketamine as Preemptive in Bilateral Infraorbital Nerve Block on Postoperative Pain Relief in Infants Undergoing Clef Lip Repair, a Controlled Study", Journal of Isfahan Medical School, 35, 433, 2017, 648-654.