1. Department of Translational Medicine, Università del Piemonte Orientale, Division of Internal Medicine, AOU Maggiore della Carità, Novara
2. Gastroenterology Unit, Department of Internal Medicine, University of Genoa, IRCCS Ospedale Policlinico San Martino, Genoa
3. SC Gastroenterology, AOU Città della Salute e della Scienza, Turin
4. Department of Environment and Prevention Sciences, University of Ferrara, Ferrara, Italy