1. Center for the Diagnosis and Prevention of Celiac Disease, Gastroenterology and Endoscopy Unit, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
2. Department of Biomedical, Surgical and Odontoiatric Sciences, Università degli Studi di Milano, Milan, Italy
3. Department of Pathophysiology and Transplantation, Università degli Studi di Milano, Milan, Italy
4. Pathology Unit, Ospedale San Paolo, Università Degli Studi di Milano, Milan, Italy
5. Division of Pathology, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
6. Department of Biomedical and Health Sciences, Università degli Studi di Milano, Milan, Italy