1. Department of Laboratory Medicine , Netherlands Cancer Institute , Amsterdam , The Netherlands
2. Department of Laboratory Medicine , University Medical Center Utrecht , Utrecht , The Netherlands
3. Department of Clinical Chemistry and Haematology , Meander Medical Center , Amersfoort , The Netherlands
4. Department of Laboratory Medicine , Red Cross Hospital , Beverwijk , The Netherlands
5. Department of Medical Oncology , The Netherlands Cancer Institute , Amsterdam , The Netherlands
6. Department of Urology , The Netherlands Cancer Institute , Amsterdam , The Netherlands
7. Department of Urology , Amsterdam University Medical Center , Amsterdam , The Netherlands