[1] Maggiore Hosp, Pediat Gastroenterol Unit, Bologna, Italy
[2] Univ Messina, Dept Human Pathol Adulthood & Childhood G Barresi, Pediat Gastroenterol Unit, Messina, Italy
[3] Inst Giannina Gaslini, Pediat Gastroenterol Unit, Genoa, Italy
[4] Inst Maternal & Child Hlth IRCCS Burlo Garofalo, Gastroenterol Digest Endoscopy & Nutr Unit, Dept Pediat, Trieste, Italy
[5] Univ Federico II, Sect Pediat, Dept Translat Med Sci, Naples, Italy
[6] Univ Federico II, European Lab Invest Food Induced Dis, Naples, Italy
[7] Univ Florence, Meyer Hosp, Pediat Gastroenterol & Nutr Unit, Florence, Italy
[8] Spirito Santo Hosp, Pediat Gastroenterol & Endoscopy Unit, Pescara, Italy
[9] Sapienza Univ Rome, Pediat Gastroenterol & Liver Unit, Dept Pediat & Infantile Neuropsychiat, Rome, Italy
[10] Bambino Gesu Pediat Hosp, Hepatol Gastroenterol & Nutr Unit, Rome, Italy