aGastroenterology Unit, ‘Nuovo Regina Margherita’ Hospital, Rome

bGastroenterology and Digestive Endoscopy Unit, ‘San Martino’ Hospital, Belluno

cGastroenterology and Digestive Endoscopy Unit,’ Santa Chiara’ Hospital, Trento

dGastroenterology and Digestive Endoscopy Unit, ‘Maggiore’ Hospital, Crema

eEndoscopy Unit, IRCCS CROB, Rionero in Vulture

fGastroenterology Unit, University of Padua, Padua

gGastroenterology Unit, ‘San Bortolo’ Hospital, Vicenza

hGastroenterology Unit, ‘Ospedale Civile Baggiovara’, Modena

iExperimental Oncological Gastroenterology Unit, CRO, Aviano

jGastroenterology Unit, ‘Saverio De Bellis’ Research Hospital, Castellana Grotte

kGastroenterology Unit, ‘Santa Maria della Misericordia’ Hospital, Perugia

lGastroenterology Unit, ”AOU Policlinico”, Palermo

mGastroenterology and Digestive Endoscopy, ‘Cattinara’ Academic Hospital, Trieste, Italy

Received 7 February 2022 Accepted 28 May 2022

Correspondence to Angelo Zullo, MD, Gastroenterologia ed Endoscopia Digestiva, Ospedale Nuovo Regina Margherita, Via Emilio Morosini, 30, 00153 Roma, Italy, Tel: +0039 06 5844 6608; fax: +0039 06 5844 6533; e-mail: [email protected]