1. Department of Urology, University Hospitals Leuven, 3000 Leuven, Belgium
2. Department of Urology, Clinique Mutualiste de la Loire, 42013 Saint-Etienne, France
3. Department of Urology, University of Würzburg, 97070 Würzburg, Germany
4. Department of Urology, Vita-Salute University, 20132 Milan, Italy
5. Department of Urology, University of Turin, 10129 Turin, Italy