Tehran University of Medical Sciences (TUMS) Academic Journal of Surgery 2423-3218 3 3-4 2017 03 26 86 86 Ali Mir Research Center for Improvement of Surgical Outcomes and Procedures AND Shariati Hospital, Tehran University of Medical Sciences, Tehran, Iran Abolfazl Shojaiefard Research Center for Improvement of Surgical Outcomes and Procedures AND Shariati Hospital, Tehran University of Medical Sciences, Tehran, Iran 2017 03 26 No Abstract https://ajs.tums.ac.ir/index.php/ajs/article/view/86 https://ajs.tums.ac.ir/index.php/ajs/article/download/86/44