[1] Hop Necker Enfants Malad, Assistance Publ Hop Paris, Unite Immunol Hematol Pediat, F-75743 Paris 15, France
[2] Univ Paris 05, Fac Med Rene Descartes, EA 3620, Paris, France
[3] Hop Bicetre, APHP, Paris, France
[4] INSERM, U569, Paris, France
[5] Univ Paris 05, Hop Necker Enfants Malad, APHP, Serv Nephrol Pediat, Paris, France
[6] Hop St Vincent de Paul, APHP, Pharmacol Lab, F-75674 Paris, France
[7] Univ Paris 05, Hop Necker Enfants Malad, APHP, Physiol Lab, Paris, France