[1] Ghent Univ Hosp, Dept Urol, B-9000 Ghent, Belgium
[2] Inst Valenciano Oncol, Dept Urol, Valencia, Spain
[3] Jeroen Bosch Hosp, Dept Urol, sHertogenbosch, Netherlands
[4] Eortc Data Ctr, Brussels, Belgium
[5] Helios Agnes Karll Hosp, Dept Urol, Bad Schwartau, Germany
[6] Univ Helsinki Hosp, Dept Urol, Helsinki, Finland
[7] Hop Pontchaillou, Dept Urol, Rennes, France