Affiliation: | 1. Department of Urology and Pediatric Urology, University Hospital Munster, Munster, Germany;2. Department of Urology and Pediatric Urology, University Medical Center of Johannes Gutenberg University, Mainz, Germany;3. Department of Urology, Ludwig-Maximilians University, Munich, Germany;4. Department of Urology, Pediatric Urology and Neuro-Urology, University Hospital Bonn, Bonn, Germany;5. Department of Urology, Vivantes Hospital Am Urban, Berlin, Germany;6. Department of Urology, Hospital Lueneburg, Lueneburg, Germany;7. Department of Urology, Goettlicher Heiland Vienna, Vienna, Austria;8. Department of Urology and Pediatric Urology, St. Barbara Hospital Hamm, Hamm, Germany;9. Department of Urology, Evangelic Hospital Bethel, Bielefeld, Germany;10. Department of Urology and Pediatric Urology, St. Elisabeth Hospital, Neuwied, Germany;11. Department of Urology and Pediatric Urology, University Hospital Heidelberg, Heidelberg, Germany;12. Department of Urology, Diakonie Hospital Schwaebisch Hall, Schwaebisch Hall, Germany;13. Department of Urology and Pediatric Urology, Helios Hospital Duisburg, Duisburg, Germany;14. Department of Urology and Pediatric Urology, Catholic Hospital St. Johann Nepomuk, Erfurt, Germany;15. Department of Urology, Hospital Weinviertel Korneuburg, Korneuburg, Austria;16. Department of Urology and Pediatric Urology, Westpfalz Medical Center, Kaiserslautern, Germany |