[1] Karolinska Univ Hosp, Dept Urol, S-17176 Stockholm, Sweden
[2] Karolinska Inst, Dept Pathol & Oncol, Div Clin Canc Epidemiol, Stockholm, Sweden
[3] Karolinska Inst, Dept Oncol & Pathol Radiumhemmet, Stockholm, Sweden
[4] Karolinska Inst, Dept Med Epidemiol & Biostat, Stockholm, Sweden