1. Department of Clinical Biochemistry and Clinical Pharmacology, University of Bonn, Bonn, Germany
2. Institute for Medical Biometry, Informatics and Epidemiology, University of Bonn, Bonn, Germany
3. Department of Pediatrics, University of Erlangen-Nuremberg, Erlangen, Germany
4. Department of Urology, University of Erlangen-Nuremberg, Erlangen, Germany
5. Department of Pediatric Surgery and Pediatric Urology, Childrens Hospital, Cologne, Germany
6. Department of Pediatric Urology, St. Hedwig Hospital Barmherzige Brüder, Regensburg, Germany
7. Department of Urology, Asklepios Hospital Harburg, Hamburg, Germany
8. Department of Pediatric Surgery, Saint-Vincent de Paul Hospital, Paris, France
9. Department of Urology, Johannes Gutenberg-University, Mainz, Germany
10. Section of Genetics, Department of Pediatrics, University of California Davis, Sacramento, California
11. Department of Urology, Johns Hopkins Hospital, Baltimore, Maryland
12. Department of Human Genetics and Pediatrics, University of Bonn, Bonn, Germany