[1] Bambino Gesu Children Hosp, Hepatometabol Dis Unit, Rome, Italy
[2] Bambino Gesu Children Hosp, Liver Res Unit, Rome, Italy
[3] Univ Roma La Sapienza, Pediat Dept, Rome, Italy
[4] Childrens Mem Hlth Inst, Dept Gastroenterol Hepatol Nutr Disorders & Pe, Al Dzieci Polskich 20, PL-04730 Warsaw, Poland