1. Department of Urology, Sindelfingen-Boeblingen Medical Center, University of Tuebingen, Sindelfingen, Germany.
2. Department of Urology, Fundació Puigvert, Autonoma University of Barcelona, Barcelona, Spain.
3. Department of Urology, Karolinska University Stockholm Sweden and Aarhus University Hospital, Stockholm, Denmark.
4. Department of Urology, University of Patras, Athens, Greece.
5. Department of Urology, Lillebaelt Hospital, University of Southern Denmark, Fredericia, Denmark.
6. Department of Urology, Cottolengo Hospital, Torino, Italy.