1. Faculty of Medicine, University of PortoDepartment of Urology, Hospital São João Porto Portugal
2. Department of UrologyMaastricht University Medical Centre Maastricht The Netherlands
3. Department of UrologyMedical University of Vienna Vienna Austria
4. Department of UrologySaint John Emergency Clinical Hospital Bucharest Romania
5. Department of UrologyMaastricht University Maastricht The Netherlands
6. Department of UrologyUniklinik Aachen RWTH Aachen Germany
7. Department of Urology, Rabdoud University Medical Centre Nijmegen The Netherlands