[1] Hop Bicetre, Serv Pediat Gen, F-94276 Le Kremlin Bicetre, France
[2] Hop Necker Enfants Malad, Serv Immunohematol & Rhumatol Pediat, F-75015 Paris, France
[3] Serv Nephrol Pediat, F-75012 Paris, France
[4] Hop Edouard Herriot, Serv Nephrol Pediat, F-69437 Lyon, France
[5] Hop Robert Debre, Serv Nephrol Pediat, F-75019 Paris, France
[6] Hop Nord Marseille, Serv Pediat, F-13915 Marseille, France
[7] Hop St Louis, Serv Hematol Pediat, F-75010 Paris, France
[8] Hop Necker Enfants Malad, Serv Dermatol, F-75015 Paris, France
[9] Hop Bicetre, INSERM, Unite 535, F-94276 Le Kremlin Bicetre, France