1. Department of Oral and Maxillofacial Medicine, Oral and Dental Diseases Research Center, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran
2. Student Research Committee, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran
3. Department of surgery, Shiraz laparoscopic research center, Shiraz University of Medical Sciences, Shiraz, Iran
4. Thoracic and Vascular Surgery Research Center, Shiraz University of Medical Sciences, Shiraz, Iran