1 Division of Pathology, Fondazione IRCCS Ca' Granda, Ospedale Maggiore Policlinico, Milan, Italy.
2 Center for the Prevention and Diagnosis of Celiac Disease, Gastroenterology and Endoscopy Unit - Fondazione IRCCS Ca' Granda, Ospedale Maggiore Policlinico, Milan, Italy.
3 Division of Pathology, Fondazione IRCCS Ca' Granda, Ospedale Maggiore Policlinico, Milan, Italy; Department of Biomedical, Surgical and Dental Sciences, University of Milan, Milan, Italy. Electronic address: [email protected].