1. Veneto Tumor Registry, Azienda Zero, Padova, Italy (M.Z., C.B.A., J.B.)
2. Department of Anatomical, Histological, Forensic Medicine and Orthopedics Sciences, “Sapienza” University of Rome, and Gastroenterology and Digestive Endoscopy Unit, Ospedale dei Castelli Hospital, Ariccia, Rome, Italy (G.A.)
3. Gastroenterology and Digestive Endoscopy Unit, San Martino Hospital, ULSS 1 Dolomiti, Belluno, Italy (B.G.)
4. Gastroenterology and Digestive Endoscopy Unit, Santa Maria del Prato Hospital, ULSS 1 Dolomiti, Feltre (BL), Italy (F.V.)
5. Gastroenterology and Digestive Endoscopy Unit, Azienda ULSS 2 Marca Trevigiana, Treviso, Italy (S.B.)
6. Gastroenterology and Digestive Endoscopy Unit, Azienda ULSS 2 Marca Trevigiana, Conegliano (TV), Italy (A.T.)
7. Gastroenterology and Digestive Endoscopy Unit, Azienda ULSS 3 Serenissima, Venezia, Italy (F.B.)
8. Gastroenterology and Digestive Endoscopy Unit, Azienda ULSS 3 Serenissima, Dolo (VE), Italy (E.C.)
9. Gastroenterology and Digestive Endoscopy Unit, Azienda ULSS 4 Veneto Orientale, San Donà di Piave (VE), Italy (D.G.)
10. Gastroenterology and Digestive Endoscopy Unit, Azienda ULSS 5 Rovigo, Italy (T.M.)
11. Gastroenterology and Digestive Endoscopy Unit, Azienda ULSS 6 Euganea, Padova, Italy (E.R.-R.)
12. Gastroenterology and Digestive Endoscopy Unit, Azienda ULSS 6 Euganea, Camposampiero, Italy (D.F.)
13. Gastroenterology and Digestive Endoscopy Unit, Azienda ULSS 6 Euganea, Monselice, Italy (M.D.)
14. Gastroenterology and Digestive Endoscopy Unit, Azienda ULSS 7 Pedemontana, Santorso, Italy (G.B.)
15. Gastroenterology and Digestive Endoscopy Unit, Azienda ULSS 7 Pedemontana, Bassano del Grappa, Italy (P.S.)
16. Gastroenterology and Digestive Endoscopy Unit, Azienda ULSS 8 Berica, Arzignano, Italy (M.P.)
17. Gastroenterology and Digestive Endoscopy Unit, Azienda ULSS 8 Berica, Vicenza, Italy (L.M.)
18. Gastroenterology and Digestive Endoscopy Unit, Azienda ULSS 9 Scaligera, San Bonifacio, Italy (G.B.)
19. Gastroenterology and Digestive Endoscopy Unit, Azienda ULSS 9 Scaligera, Villafranca, Italy (D. Di P.)
20. Gastroenterology and Digestive Endoscopy Unit, Azienda ULSS 9 Scaligera, Legnago, Italy (M.A.)
21. Gastroenterology and Digestive Endoscopy Unit, Azienda Ospedaliera Universitaria Integrata di Verona, Verona, Italy (A.G.)
22. Department of Biomedical Sciences, Humanitas University, Pieve Emanuele, Milan, Italy, and IRCCS Humanitas Research Hospital, Endoscopy Unit, Rozzano, Milan, Italy (A.R., C.H.)
23. Division of Gastroenterology/Hepatology, Indiana University School of Medicine, Indianapolis, Indiana (D.K.R.)
24. Veneto Tumor Registry, Azienda Zero, and Department of Medicine DIMED Pathology and Cytopathology Unit, University of Padova, Padova, Italy (M.R.).