1. Third Department of Urology, Attikon University Hospital, School of Medicine, National and Kapodistrian University of Athens, 12462 Athens, Greece
2. Department of Urology II, European Interbalkan Medical Center, 55535 Thessaloniki, Greece
3. Department of Urology, Faculty of Medicine, School of Health Sciences, University of Ioannina, 45110 Ioannina, Greece
4. Department of Obstetrics and Gynecology, Royal Cornwall Hospital, Truro TR1 3LJ, UK
5. School of Medicine, European University Cyprus, 1516 Nicosia, Cyprus
6. Department of Urology, Faculty of Medicine, School of Health Sciences, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece