Department of Pediatrics;
San Paolo Hospital;
University of Milan;
20142Milan;
Italy;
Unit of Medical Statistics;
San Paolo Hospital;
University of Milan;
20142 Milan;
Italy;
Department of Radiology;
San Paolo Hospital;
20142 Milan;
Italy;
Nonalcoholic; fatty; liver; disease; Childhood; obesity; Serum; transaminases; Magnetic; resonance; imaging; Nutritional; intervention;