1. Department of Cardiology, Iran University of Medical Sciences, Rasool Akram General Hospital, Tehran, Iran
2. Department of Gastroenterology, Colorectal Research Center, Iran University of Medical Sciences, Rasool Akram General Hospital, Tehran, Iran
3. Department of Internal Medicine, Tehran University of Medical Sciences, Tehran, Iran
4. Department of Gastroenterology, Iran University of Medical Sciences, Rasool Akram General Hospital, Tehran, Iran