Aristotle University of Thessaloniki - Fourth Department of Internal Medicine, ‘Martha-Maria’ Hospital Nuremberg - Department of Urology, Aristotle University of Thessaloniki - Faculty of Medicine, ‘Martha-Maria’ Hospital Nuremberg - Department of Urology, King’s College London - GKT School of Medical Education, Aristotle University of Thessaloniki - Second Propedeutic Department, Aristotle University of Thessaloniki - Second Propedeutic Department, ‘Martha-Maria’ Hospital Nuremberg - Department of Urology and Aristotle University of Thessaloniki - Fourth Department of Internal Medicine