[1] S Elia Raimondi Hosp, Gastroenterol & Endoscopy Unit, Caltanissetta, Italy
[2] Santa Chiara Hosp, Gastroenterol & Endoscopy Unit, Trento, Italy
[3] Univ Padua, Dept Surg Oncol & Gastroenterol DiSCOG, Padua, Italy
[4] St Orsola Marcello Malpighi Hosp, Dept Med & Surg Sci, Gastroenterol Unit, Bologna, Italy
[5] Humanitas Univ, Humanitas Res Hosp, Div Gastroenterol, Digest Endoscopy Unit, Rozzano, MI, Italy
[6] Univ Naples Federico II, Dept Clin Med & Surg, Gastroenterol Unit, Naples, Italy
[7] Univ Genoa, Dept Internal Med, Gastroenterol Unit, Policlin San Martino, Genoa, Italy
[8] Gastroenterol, Multivisceral Transplant Unit, Dept Surg Oncol & Gastroenterol, Padua, Italy
[9] Univ Pisa, Gastrointestinal Unit, Dept Translat Sci & New Technol Med & Surg, Pisa, Italy
[10] St Andrea Univ Hosp, ENETS Ctr Excellence, Digest Dis Unit, Rome, Italy
[11] Univ Politecn Marche, Dept Gastroenterol & Hepatol, Ancona, Italy
[12] Sapienza Univ Rome, Dept Precis & Translat Med, I-00185 Rome, Italy
[13] Fdn Policlin Univ Agostino Gemelli IRCCS, Digest Dis Ctr, Rome, Italy