1 Department of Surgery, Minimally Invasive Surgery Research Center, Division of Minimally Invasive and Bariatric Surgery, Rasool-E Akram Hospital, School of Medicine, Iran University of Medical Sciences, Tehran, Iran. mkermansaravi@yahoo.com.
2 Center of Excellence of European Branch of International Federation for Surgery of Obesity, Hazrat_e Rasool Hospital, Tehran, Iran. mkermansaravi@yahoo.com.
3 Department of Surgery, Minimally Invasive Surgery Research Center, Division of Minimally Invasive and Bariatric Surgery, Rasool-E Akram Hospital, School of Medicine, Iran University of Medical Sciences, Tehran, Iran.
4 Center of Excellence of European Branch of International Federation for Surgery of Obesity, Hazrat_e Rasool Hospital, Tehran, Iran.
5 Tehran Obesity Treatment Center, Department of Surgery, Shahed University, Tehran, Iran.
6 Department of Surgery, Imam Khomeini Hospital Complex, Tehran University of Medical Sciences, Tehran, Iran.
7 Laparoscopy Research Center, Shiraz University of Medical Sciences, Shiraz, Iran.
8 Critical Care Quality Improvement Research Center at Shahid Modarres Hospital, Department of General Surgery, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
9 Department of Surgery, Isfahan Minimally Invasive Surgery and Obesity Research Center, Alzahra University Hospital, Isfahan University of Medical Sciences, Isfahan, Iran.
10 Surgical Oncology Research Center, Mashhad University of Medical Sciences, Mashhad, Iran.
11 Iranian Hospital, Alwasl Road, Dubai, United Arab Emirates.
12 Nikan Private Hospital, Tehran, Iran.
13 Department of General Surgery, Loghman Hakim Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
14 Minimally Invasive Surgery Research Center, Iran University of Medical Sciences, Tehran, Iran.
15 Department of General Surgery, Shariati Hospital, Isfahan, Iran.