1. First Department of Urology, G. Gennimatas Hospital, Aristotle University of Thessaloniki, Thessaloniki, Greece
2. Department of Urology, ‘Martha-Maria’ Hospital Nuremberg, Nuremberg, Germany
3. School of Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki, Thessaloniki, Greece
4. Department of Medicine, Surgery, Dentistry “Scuola Medica Salernitana”, Urology Unit—University of Salerno, Salerno, Italy