1. Department of Urology; University Medical Centre Utrecht; Utrecht The Netherlands
2. Department of Urology; University of Groningen, University Medical Center Groningen; Groningen The Netherlands
3. Eindhoven Cancer Registry/Comprehensive Cancer Centre South; Eindhoven The Netherlands
4. Department of Urology; St. Elisabeth Hospital; Tilburg The Netherlands
5. Department of Epidemiology; University of Groningen, University Medical Center Groningen; Groningen The Netherlands
6. Department of Radiation Oncology; Academic Medical Centre of Amsterdam; Amsterdam The Netherlands
7. Department of Public Health; Erasmus University Medical Centre Rotterdam; Rotterdam The Netherlands