1. Department of Urology, West Middlesex University Hospital, Chelsea & Westminster Hospital NHS Foundation Trust, London, United Kingdom
2. Department of Urology, Charring Cross Hospital, London, United Kingdom
3. Department of Pediatric Surgery, Pendeli Children’s Hospital, Athens, Greece
4. Department of Pediatric Surgery, School of Medicine, Attikon University Hospital, National and Kapodistrian University of Athens, Athens, Greece
5. UCL Division of Surgery & Interventional Science, University College London, London, United Kingdom