[1] Azienda Sanit 1 Paola CZ, Paola, CZ, Italy
[2] Univ Oradea, Dept Gastroenterol, Oradea, Romania
[3] Direz Univ Aquila, Unita Operat Gastroenterol Epatol & Nutr, I-67100 Laquila, Italy
[4] ASL 4, Laquila, Italy
[5] Univ Naples 2, Dipartimento Med Chirurg Internist Clin & Sperime, Naples, Italy
[6] Azienda Osped Padova, Cattedra Gastroenterol, Padua, Italy
[7] Azienda Osped Univ, Policlin Martino, Unita Operat Clin Med, Messina, Italy
[8] Univ Cattolica Sacro Cuore, Policlin A Gemelli, Cattedra Gastroenterol, Rome, Italy
[9] Osped St Antonio Azienda ULSS 16, UOC Gastroenterol, Padua, Italy
[10] Azienda Osped Careggi, Cattedra Gastroenterol, Florence, Italy
[11] Presidio Osped Treviso, UOC Gastroenterol, Treviso, Italy
[12] Univ Bari, Clin Med Augusto Murri, Bari, Italy
[13] Azienda Sanit Osped Molinette, Div Gastroenterol & Epatol, Turin, Italy
[14] Hosp Judetean Timisoara, Dept Gastroenterol & Hepatol, Timisoara, Romania
[15] Univ Naples Federico 2, Dipartimento Anat Patol, Naples, Italy