Bita Geramizadeh1,2, Tuba Abbasi3, Ali-Mohammad Bananzadeh4, Mohammad-Ali Nejati5. 1. Transplant Research Center, Shiraz University of Medical Sciences, Shiraz, Iran. geramib@gmail.com. 2. Department of Pathology, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran. geramib@gmail.com. 3. Department of Pathology, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran. 4. Department of Surgery, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran. 5. Department of Gastroenterology, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran.