1. Associate professor, Gastroenterology and Hepatology Disease Research Center, Qom University of Medical Sciences, Qom, Iran
2. Gastrointestinal and Liver Diseases Research Center, Iran University of Medical Sciences, Tehran, Iran
3. Pharmacological Research Center of Medicinal Plants, Mashhad University of Medical Sciences, Mashhad, Iran
4. Department of Internal Medicine, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran