1. University of Zurich, Zurich, Switzerland
2. Luzerner Kantonsspital, Lucerne, Switzerland
3. University of Lucerne, Lucerne, Switzerland
4. Department of Oncology, The Cancer Clinic, St Olav's University Hospital, Trondheim, Norway
5. Department of Clinical and Molecular Medicine, Faculty of Medicine and Health Science, NTNU, Trondheim, Norway
6. Department of Urology, Uniklinik Koln, Cologne, Germany
7. Department of Urology, Medical University of Vienna, Vienna, Austria