Nereo Segnan1,2,3,4,5,6,7,8,9,10,11,12,13,14, Paola Armaroli1,2,3,4,5,6,7,8,9,10,11,12,13,14, L Bonelli1,2,3,4,5,6,7,8,9,10,11,12,13,14, Mauro Risio1,2,3,4,5,6,7,8,9,10,11,12,13,14, Stefania Sciallero1,2,3,4,5,6,7,8,9,10,11,12,13,14, Marco Zappa1,2,3,4,5,6,7,8,9,10,11,12,13,14, B. Andreoni1,2,3,4,5,6,7,8,9,10,11,12,13,14, Arrigo Arrigoni1,2,3,4,5,6,7,8,9,10,11,12,13,14, L Bisanti1,2,3,4,5,6,7,8,9,10,11,12,13,14, Claudia Casella1,2,3,4,5,6,7,8,9,10,11,12,13,14, C. Crosta1,2,3,4,5,6,7,8,9,10,11,12,13,14, Fabio Falcini1,2,3,4,5,6,7,8,9,10,11,12,13,14, F Ferrero1,2,3,4,5,6,7,8,9,10,11,12,13,14, Adriano Giacomin1,2,3,4,5,6,7,8,9,10,11,12,13,14, Orietta Giuliani1,2,3,4,5,6,7,8,9,10,11,12,13,14, Andrea Santarelli1,2,3,4,5,6,7,8,9,10,11,12,13,14, Carmen Beatriz Visioli1,2,3,4,5,6,7,8,9,10,11,12,13,14, Roberto Zanetti1,2,3,4,5,6,7,8,9,10,11,12,13,14, Wendy Atkin1,2,3,4,5,6,7,8,9,10,11,12,13,14, Carlo Senore1,2,3,4,5,6,7,8,9,10,11,12,13,14
1Affiliations of authors: Centro di Prevenzione Oncologica Piemonte and S. Giovanni University Hospital, Turin, Italy (NS, PA, AS, CS)
2Cancer Registry and Centro di Prevenzione Oncologica Piemonte, Azienda Sanitaria Locale, Biella, Italy (AG)
3Clinical and Descriptive Epidemiology Unit, Istituto per lo Studio e la Prevenzione Oncologica, Florence, Italy (MZ, CBV)
4Department of Surgery and Cancer, Imperial College London, London, United Kingdom (WSA)
5General Surgery Unit , Istituto Europeo di Oncologia, Milan, Italy and Milan University Medical School, Milan, Italy (BA)
6Medical Oncology Unit, Azienda Ospedaliero-Universitaria San Martino e Cliniche Universitarie Convenzionate, Genoa, Italy (SS)
7Piedmont Cancer Registry, Centro di Prevenzione Oncologica Piemonte and S. Giovanni University Hospital, Turin, Italy (RZ)
8Romagna Cancer Registry and Romagna Scientific Institute for the Study and Treatment of Cancer, Meldola, Forlì, Italy (FFa, OG)
9Secondary Prevention and Screening and Descriptive Epidemiology, Tumour Registries, Istituto Nazionale per la Ricerca sui Tumori, Genoa, Italy (LBo, CCa)
10Unit of Endoscopy, Istituto Europeo di Oncologia, Milan, Italy (CCr)
11Unit of Epidemiology, Azienda Sanitaria Locale Città di Milano, Milano, Italy (LBi)
12Unit of Gastroenterology 2, San Giovanni Antica Sede Hospital, Azienda Ospedaliero-Universitaria San Giovanni Battista, Turin, Italy (AA)
13Unit of Gastroenterology, Infermi Hospital, Azienda Sanitaria Locale Biella, Italy (FFe)
14Unit of Pathology, IRCC, Candiolo, Italy (MR)