1. Department of Urology, Faculty of Medicine, School of Health Sciences, University of Ioannina, 45110 Ioannina, Greece
2. Department of Microbiology, University Hospital of Ioannina, 45500 Ioannina, Greece
3. Department of Urology, Faculty of Medicine, School of Health Sciences, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
4. Clinical Microbiology Laboratory, Attikon General University Hospital of Athens, 12462 Athens, Greece