1. Fourth Department of Internal Medicine, Medical School, Hippokration General Hospital, Aristotle University of Thessaloniki , Thessaloniki, Greece
2. Department of Urology, ‘Martha-Maria’ Hospital Nuremberg , Nuremberg, Germany
3. Medical School, Aristotle University of Thessaloniki , Thessaloniki, Greece
4. GKT School of Medical Education, King's College London , London, UK
5. Second Propedeutic Department of Internal Medicine, Medical School, Hippokration General Hospital, Aristotle University of Thessaloniki , Thessaloniki, Greece