1. Finnish Centre for Radiation and Nuclear Safety, PO Box 14, 00881 Helsinki, Finland and Finnish Cancer Registry, Liisankatu 21 B, 00170 Helsinki, Finland
2. National Cancer Institute, Division of Cancer Prevention and Control, Bethesda, MI) 20892, USA
3. Erasmus University, Department of Urology, PO Box 1738, 3000 DR Rotterdam, The Netherlands
4. Oncologic Centre Antwerp — Department of Urology, A Z Middelheim, Lindenreef 1, 2020 Antwerp, Belgium