1. Center for The Prevention and Diagnosis of Celiac Disease, Gastroenterology and Endoscopy Unit, Fondazione IRCCS Cà Granda Ospedale Maggiore Policlinico, Via F. Sforza 35, 20100 Milan, Italy
2. Department of Pathophysiology and Transplantation, Università degli Studi di Milano, Via F. Sforza 35, 20100 Milan, Italy