1. Aristotle University of Thessaloniki, Faculty of Health Sciences, Urology Thessaloniki, Thessaloniki, Central Macedonia, Greece
2. Aristotle University of Thessaloniki Faculty of Health Sciences, Urology Thessaloniki, Ethnikis Aminis 41, Thessaloniki, Central Macedonia 54635, Greece
3. Main-Kinzig-Kliniken Gelnhausen, Urology Gelnhausen, Gelnhausen, Hessen, Germany
4. Hasselt University, Urology Hasselt, Hasselt, Limburg, Belgium
5. KU Leuven University Hospitals Leuven, Urology Leuven, Leuven, Flanders, Belgium
6. Service d’urologie, Centre Hospitalier Universitaire de Liege, Liege, Belgium