[1] IRCCS Burlo Garofolo, Inst Maternal & Child Hlth, Trieste, Italy
[2] Inst Giannina Gaslini, Pediat Gastroenterol & Endoscopy Unit, Genoa, Italy
[3] Childrens Hosp Bambino Gesu, Dept Pediat, Rome, Italy
[4] Childrens Hosp Bambino Gesu, Digest Dis Unit, Rome, Italy
[5] Inst Giannina Gaslini, Pediat Hematol Oncol Unit, Genoa, Italy
[6] Sapienza Univ Rome, Pediat Gastroenterol & Liver Unit, Rome, Italy
[7] Univ Messina, Pediat Gastroenterol & Cyst Fibrosis Unit, Messina, Italy
[8] Azienda Osped Univ Citta Salute & Sci Torino, Pediat Gastroenterol Unit, Turin, Italy