1. Department of Urology, Faculty of Medicine, Aristotle University of Thessaloniki School of Health Sciences, Thessaloniki, Greece
2. Department of Urology, Martha-Maria Hospital Nuremberg, Nuremberg, Germany
3. Department of Pharmaceutical Technology, Aristotle University of Thessaloniki, Thessaloniki, Greece
4. Department of Chemical Engineering, Aristotle University of Thessaloniki, Thessaloniki, Greece
5. Department of Hygiene, Social-Preventive Medicine & Medical Statistics, Aristotle University of Thessaloniki Medical School, University Campus, Thessaloniki, Greece
6. Department of Urology, Jessa Hospital, Hasselt University, Hasselt, Belgium
7. Department of Urology, University Hospitals Leuven, Leuven, Belgium