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