1 Department of Gastroenterology, Baqiyatallah Research Center for Gastroenterology and Liver Disease, Tehran, Iran ; Department of Gastroenterology, Baqiyatallah University of Medical Sciences, Tehran, Iran.
2 Department of Gastroenterology, Baqiyatallah University of Medical Sciences, Tehran, Iran.
3 Department of Medicine, Dr. Taheri Medical Research Group, Tehran, Iran.