[1] Fac Med Necker Enfants Malad, INSERM EMI 0212, F-75730 Paris 15, France
[2] Hop Europeen Georges Pompidou, Dept Hepato Gastroenterol, Paris, France
[3] Hop Necker Enfants Malad, Dept Pathol, Paris, France
[4] Univ Paris 05, Hop Necker Enfants Malad, Dept Pediat Gastroenterol & Nutr, Paris, France