1. Department of Vascular Surgery, “Democritus” University of Thrace, University Hospital of Alexandroupolis, Alexandroupolis, Greece
2. Fluids Section, School of Mechanical Engineering, National Technical University of Athens, Athens, Greece
3. Athens University Medical School, Athens, Greece
4. Department of Vascular Surgery, University of Crete, University Hospital of Heraklion, Heraklion, Greece