1. Mohammed VI University Hospital Center, Digestive Disease Research Laboratory, Oujda, Morocco
2. Mohammed VI University Hospital, Hepato Gastro Enterology Unit, Oujda, Morocco, Oujda, Morocco
3. Mohammed VI University Hospital, Hepato Gastro Enterology Unit,, Oujda, Morocco
4. Department of Hepato-gastroenterology, Mohammed VI University hospital center, Oujda, Morocco., Oujda, Morocco