1. Skull Base Research Center, Loghman Hakim Hospital Shahid Beheshti University of Medical Sciences Tehran Iran
2. Research Assistant, Gastroenterology, and Liver Diseases Research Center Research Institute for Gastroenterology and Liver Diseases, Shahid Beheshti University of Medical Sciences Tehran Iran
3. Kermanshah University of Medical Science Kermanshah Iran
4. Tehran University of Medical Sciences, School of Medicine Tehran Iran
5. Hormozgan University of Medical Science Bandar Abbas Iran
6. Cardiovascular Research Center Mazandaran University of Medical Sciences Sari Iran
7. Assistant Professor of Internal Medicine, Department of Internal Medicine School of Medicine, Shahid Beheshti University of Medical Sciences Tehran Iran
8. School of Medicine, Tehran University of Medical Sciences Tehran Iran