| نویسندگان مقاله |
| Roollahh Valizadeh
Department of Epidemiology, Student Research Committee, School of Public Health, Iran University of Medical science, Tehran, Iran and Minimally Invasive Surgery Research Center, Iran University of Medical Science, Tehran. Iran
| Fahimeh Yarigholi
Minimally Invasive Surgery Research Center, Iran University of Medical Science, Tehran. Iran
| Hamed Gholizadeh
Department of Surgery, Baqiatallah University of Medical Sciences, Tehran , Iran
|