1 Gastroenterology Unit, IRCCS Policlinico San Donato, San Donato Milanese, Italy.
2 Gastroenterology Unit, Rho Hospital, ASST Rhodense, Lombardy, Italy.
3 General Surgery Division, Rho Hospital, ASST Rhodense, Rho, Italy.
4 Gastroenterology Unit, IRCCS Policlinico San Donato, San Donato Milanese, Italy; Department of Biomedical Sciences for Health, University of Milan, Milan, Italy.