Gastrointestinal & Liver Diseases Research Center (GLDRC), Guilan University of Medical Sciences (GUMS), Rasht, Iran; Caspian Digestive Diseases Research Center, Guilan University of Medical Sciences (GUMS), Rasht, Iran. Gastrointestinal & Liver Diseases Research Center (GLDRC), Guilan University of Medical Sciences (GUMS), Rasht, Iran. Halal Research Center of IRI, FDA, Tehran, Iran. Gastrointestinal & Liver Diseases Research Center (GLDRC), Guilan University of Medical Sciences (GUMS), Rasht, Iran; Caspian Digestive Diseases Research Center, Guilan University of Medical Sciences (GUMS), Rasht, Iran. Electronic address: ghanaie@yahoo.com. Gastrointestinal & Liver Diseases Research Center (GLDRC), Guilan University of Medical Sciences (GUMS), Rasht, Iran; Caspian Digestive Diseases Research Center, Guilan University of Medical Sciences (GUMS), Rasht, Iran. Electronic address: farajov@gmail.com.