1. From the Departments of Paediatric Urology (BWDDJ, KPW, DJK), Andrology (CADGB, RFAW), Urology (CADGB, RFAW), Pathology/Laboratory for Experimental Patho-Oncology/Josephine Nefkens Institute (CADGB, HS, JWO, LHJL) and General Surgery (GJP), Erasmus Medical Center, University Medical Center, Rotterdam, The Netherlands