1 First Department of Surgery, National and Kapodistrian University of Athens, Laikon General Hospital, 17 Agiou Thoma Street, Athens, Greece.
2 First Department of Urology, National and Kapodistrian University of Athens, Laikon General Hospital, Athens, Greece.
3 First Department of Surgery, National and Kapodistrian University of Athens, Laikon General Hospital, 17 Agiou Thoma Street, Athens, Greece. dr_kamast@yahoo.gr.