Department of Gastroenterology Sanremo;
Italy;
Department of Gastroenterology Molinette Hospital;
Torino;
Italy;
Department of Surgical-Surgery Endoscopy Spedali Civili;
University of Brescia;
Italy;
Department of Internal Medicine University of Genova;
Italy;
Division of Pathology University of Genova;
Italy;
2nd Department of Pathology Spedali Civili;
University of Brescia;
Italy;
Anesthesia and Resuscitation Unit National Institute for Cancer Research;
Genova;
Italy;
Epidemiology and Biostatistics National Institute for Cancer Research;
Genova;
Italy;