[1] CHU Bordeaux, Hop Pellegrin Enfants, Dept Pediat Urol & Pediat Surg, F-33076 Bordeaux, France
[2] Univ Toronto, Div Urol, Dept Surg, Hosp Sick Children & Res Inst,Dev & Stem Cell Bio, Toronto, ON, Canada
[3] Univ Toronto, Dev & Stem Cell Biol, Dept Physiol, Hosp Sick Children & Res Inst, Toronto, ON, Canada
[4] Indiana Univ, Riley Hosp Children, Indianapolis, IN 46204 USA
[5] CHU Montpellier, Hop Lapeyronie, Dept Pediat Urol & Pediat Surg, Montpellier, France
[6] Univ Montpellier, Montpellier, France
[7] Univ Montpellier, Inst Desbrest Epidemiol & Sante Publ IDESP, Montpellier, France
[8] Amsterdam UMC, Sect Pediat Urol, Dept Urol, Locat VUmc, Amsterdam, Netherlands
[9] Univ Med Ctr Utrecht, Wilhelmina Childrens Hosp, Dept Med Psychol & Social Work, Urol, POB 85090, NL-3508 AB Utrecht, Netherlands
[10] Copenhagen Univ Hosp, Rigshosp, Dept Pediat Surg, DK-2100 Copenhagen, Denmark
[11] Karolinska Inst, Bioclinicum, Dept Womens & Childrens Hlth, Fl 10, SE-17176 Stockholm, Sweden
[12] Connecticut Childrens Med Ctr, Div Urol, Dept Res, Hartford, CT USA