1. 2nd Department of Surgery, Aretaieion Academic Hospital, School of Medicine, National and Kapodistrian University of Athens, Athens, Greece
2. 1st Department of Urology, Laikon General Hospital, School of Medicine, National and Kapodistrian University of Athens, Athens, Greece
3. 2nd Department of Urology, Sismanogleion General Hospital, School of Medicine, National and Kapodistrian University of Athens, Athens, Greece