1. Coeliac Centre/First Department of Internal Medicine, University of Pavia, Pavia, Italy
2. Department of Pathology, Fondazione IRCCS Policlinico San Matteo, University of Pavia, Pavia, Italy
3. Pediatrics Clinic, University of Brescia, Spedali Civili, Brescia, Italy
4. Department of Pathology, University of Brescia, Spedali Civili, Brescia, Italy