1. Second Department of Surgery, School of Medicine, Aretaieion Hospital, National and Kapodistrian University of Athens, Maroussi, Greece.
2. Second Department of Urology, School of Medicine, Sismanogleion Hospital, National and Kapodistrian University of Athens, Maroussi, Greece.
3. Southmead Hospital, Bristol Urological Institute, Bristol, United Kingdom.
4. Department of Therapeutics, School of Medicine, Alexandra Hospital, National and Kapodistrian University of Athens, Athens, Greece.