1. Medical Pediatric Clinic, Hospital Center and University of Nantes, Nantes, France
2. Pediatric Services, Hospital Center of A. Beclere, Clamart, France
3. Hospital Center of Saint-Brieuc, Saint-Brieuc, France
4. Pediatric Nephrology Services, Hospital Center and University of Toulouse, Toulouse, France
5. Hospital Center and University of Montpellier, Montpellier, France
6. Hospital Center of La Roche sur Yon, La Roche sur Yon, France
7. Hospital Center of Vannes, Vannes, France
8. Hospital Center and University of Brest, Brest, France
9. Necker Hospital for Sick Children, Paris, France
10. Hospital Center and University of Angers, Angers, France
11. Robert Debre Hospital, Paris, France
12. Hospital Center and University of Limoges, Limoges, France
13. Hospital Center of Saint Nazaire, Saint Nazaire, France
14. Hospital Center and University of Clermont-Ferrand, Clermont-Ferrand, France
15. Hospital Center and University of Rennes, Rennes, France
16. Hospital Center of Lorient, Lorient, France
17. Biostatistics Department, Hospital Center and University of Nantes, Nantes, France