1. Research Institute for Gastroenterology and Liver Diseases (RIGLD), Shahid Beheshti University of Medical Sciences, Tehran, Iran
2. Division of pancreatobiliary surgery, Surgery Department of Taleghani Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran
3. Director of Hematology and Medical Oncology Program. Division of Medical Oncology, Taleghani Hospital Cancer Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
4. Medicine Faculty of Mashhad Branch, Islamic Azad University, Mashhad, Iran.