[1] Bambino Gesu Pediat Hosp, Hepatol Gastroenterol & Nutr Unit, I-00165 Rome, Italy
[2] Bambino Gesu Pediat Hosp, Dept Radiol, Hepatobiliopancreat Imaging Unit, I-00165 Rome, Italy
[3] Bambino Gesu Pediat Hosp, Digest Surg & Endoscopy Unit, I-00165 Rome, Italy