1. Thoracic and Vascular Surgery Research Center Shiraz University of Medical Science Shiraz Iran
2. School of Medicine Shiraz University of Medical Sciences Shiraz Iran
3. Student Research Committee, School of Medicine Shiraz University of Medical Sciences Shiraz Iran
4. Department of Surgery Shiraz University of Medical Sciences Shiraz Iran
5. Trauma Research Center, Rajaee (Emtiaz) Trauma Hospital Shiraz University of Medical Sciences Shiraz Iran