[1] IRCCS, Ist Oncol Veneto, Unita Chirurg Oncol, Padua, Italy
[2] Univ Michigan Hlth Syst, Div Gastroenterol, Ann Arbor, MI USA
[3] Univ Padua, Unita Biostat & Epidemiol, Padua, Italy
[4] Azienda Osped Univ Padova, Unita Chirurg Epatobiliare & Trapianto Epat, Padua, Italy
[5] Azienda Univ Padova, Div Gastroenterol, Padua, Italy