1 University Division of Gastroenterology, Department of Medical Sciences, University of Turin, City of Health and Science, Turin, Italy. Electronic address: pennazio.marco@gmail.com.
2 University Division of Gastroenterology, Department of Medical Sciences, University of Turin, City of Health and Science, Turin, Italy.
3 Pathology Unit, Department of Medical Sciences, University of Turin, City of Health and Science, Turin, Italy.