abtin hydarzadeh md in social medicine, assistant professor of research center for gastrointestinal and liver diseases, gilan university of medical sciences mahmoud yossefi mashhoor md in gastroenterology, assistant professor of research center for gastrointestinal and liver diseases, gilan university of medical sciences fariborz mansour ghanaie md in gastroenterology, professor of research center for gastrointestinal and liver diseases, gilan university of medical sciences nasim masood nia general practitioner, center for gastrointestinal and liver diseases, gilan university of medical sciences farahnaz jokar academic staff, center for gastrointestinal and liver diseases, gilan university of medical sciences maryam bakhshandeh general practitioner, center for gastrointestinal and liver diseases, gilan university of medical sciences

Khosro Faghani Makrani, Mehdi Mardani, Naghi Fazeli,