1. Second Department of Surgery, Aretaieion Academic Hospital, Medical School, National and Kapodistrian University of Athens, Athens, Greece
2. First Department of Urology, Laikon General Hospital, Medical School, National and Kapodistrian University of Athens, Athens, Greece
3. Second Department of Urology, Sismanogleion General Hospital, Medical School, National and Kapodistrian University of Athens, Athens, Greece