1. NYU Langone Health, NYU Grossman School of Medicine, New York, New York, USA;
2. Department of Biomedical Sciences, Humanitas University, IRCCS Humanitas Research Hospital, Endoscopy Unit, Milan, Italy;
3. White River Junction VAMC, University of Connecticut School of Medicine, The Geisel School of Medicine at Dartmouth, Hanover, New Hampshire, USA.