1. Ludwig-Maximlians-University Munich (LMU); Munich Germany
2. Landeskrankenhaus Vocklabruck; Vocklabruck Austria
3. Department of Urology; Marienklinik Bozen; Bolzano Italy
4. Department of Urology and Paediatric Urology; St. Barbara Hospital Hamm GmbH; Hamm Germany
5. Klinikum Dachau; Dachau Germany
6. Department of Urology; University of Innsbruck; Innsbruck Austria