[1] Univ Coll Dublin, Dublin, Ireland
[2] Royal Coll Surgeons Ireland, Paediat & Adolescent Urol, Dublin, Ireland
[3] Erasmus MC, Dept Pediat Urol, Rotterdam, Netherlands
[4] Charite Med Univ Berlin, Dept Urol, Berlin, Germany
[5] Univ Med Ctr Groningen, Pediat Urol, Groningen, Netherlands
[6] Leeds Teaching Hosp NHS, Dept Paediat Surg, Leeds, W Yorkshire, England
[7] Univ Florence, Meyer Children Hosp, Dept Pediat Urol, Florence, Italy
[8] Med Univ Vienna, Dept Pediat Urol, Vienna, Austria
[9] Univ Sienna, Paediat Surg, Siena, Italy
[10] Ghent Univ Hosp, Dept Pediat Urol, Ghent, Belgium
[11] Mem Bahcelievler Hosp, Dept Pediat Urol, Istanbul, Turkey
[12] Ludwig Maximilians Univ LMU, Dept Urol, Munich, Germany