[1] CHU Nancy, Hop Enfants, Serv Chirurg Infantile, Vandoeuvre Les Nancy, France
[2] CHU Nancy, Hop Marin, Serv Epidemiol & Evaluat Clin, EA 3444, Nancy, France
[3] CHU Nancy, Hop Marin, INSERM, CEC, Nancy, France
[4] CHU Besancon, Hop St Jacques, Serv Chirurg Infantile, F-25030 Besancon, France
[5] CHU Marseille, Hop Enfants La Timone, Serv Chirurg Infantile, Marseille, France
[6] Hop St Joseph, Serv Chirurg Infantile & Adolescent, F-75674 Paris, France
[7] Hop Necker Enfants Malad, Serv Chirurg Infantile, Paris, France
[8] CHU Toulouse, Hop Enfants Purpan, Serv Chirurg Infantile, Toulouse, France
[9] CHU Lyon, Hop Debrousse, Serv Chirurg Infantile, Lyon, France
[10] CHU Lyon, Hop Henri Gabrielle, Urol Serv, Lyon, France