1. Department of Urology, Al Zahraa Hospital, University Medical Center, Lebanese University, Beirut, Lebanon
2. 2nd Department of Urology, School of Medicine, Sismanoglio Hospital, National and Kapodistrian University of Athens, Athens, Greece
3. Department of Radiation Oncology, University of Patras, Patras, Greece
4. Department of Surgery, School of Medicine, Aretaieion Hospital, National and Kapodistrian University of Athens, Athens, Greece