1. University Hospital of Alexandroupolis Department of Urology, , Democritus University of Thrace, Alexandroupolis, Greece
2. University Hospital of Alexandroupolis 1st General Surgery Department, , Democritus University of Thrace, Alexandroupolis, Greece
3. University Hospital Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU) Department of Vascular Surgery, , Erlangen, Germany