1. Centre for Digestive Diseases, Wingate Institute of Neurogastroenterology, Blizard Institute, Barts and the London School of Medicine & Dentistry; Queen Mary University of London; London United Kingdom
2. Department of Gastroenterology; University Hospitals of North Midlands; Stoke on Trent Staffordshire United Kingdom
3. Dipartimento di Fisiopatologia Medico-Chirurgica e dei Trapianti, Università degli Studi of Milan and Gastroenterology and Endoscopy Unit; Fondazione IRCCS Cà Granda - Ospedale Maggiore Policlinico; Milan Italy
4. GIOME, College of Bioengineering; Chongqing University; Chongqing China
5. Department of Surgery; Prince of Wales Hospital; Shatin Hong Kong SAR
6. Department of Medicine; University of Southern California; Los Angeles California