[1] Fdn Policlin Univ A Gemelli, IRCCS, Digest Endoscopy Unit, Largo A Gemelli 8, I-00168 Rome, Italy
[2] Carol Davila Univ Med, Colentina Clin Hosp, Dept Gastroenterol, Bucharest, Romania
[3] Catholic Univ, IRCCS, Fdn Policlin Univ A Gemelli, Div Gastroenterol, Rome, Italy
[4] Catholic Univ, IRCCS, Fdn Policlin Univ A Gemelli, Div Oncol, Rome, Italy
[5] Catholic Univ, IRCCS, Fdn Policlin Univ A Gemelli, Digest Endoscopy Unit, Rome, Italy
[6] Univ Strasbourg, IHU USIAS, Strasbourg, France
[7] Catholic Univ, IRCCS, Fdn Policlin Univ A Gemelli, Digest Surg, Rome, Italy