1. From the Internal Medicine, Gastroenterology and Liver Diseases Unit (M.G., M.A.Z., M.P., A.G.) and Institute of Biochemistry and Clinical Biochemistry (E.D.), Catholic University of the Sacred Heart, Gemelli Hospital, Largo A. Gemell, 8, 00168 Rome, Italy; and Hepatometabolic (S.V., V.N.) and Radiology Units (L.M., P.T.), Bambino Gesù Children’s Hospital, Rome, Italy.