[1] Univ Paris 05, Hop Necker Enfants Malad, Dept Pediat Gastroenterol Hepatol & Nutr, F-75743 Paris 15, France
[2] Univ Hosp Pitie Salpetriere, Dept Biol, Paris, France
[3] Labs Lilly France, St Cloud, France
[4] Univ Paris 05, Hop Necker Enfants Malad, Dept Biol, F-75743 Paris 15, France