1. Department of Vascular Diseases, University Medical Centre Ljubljana, Ljubljana, Slovenia
2. VAS-European Independent Foundation in Angiology/Vascular Medicine, Milan, Italy
3. Department of Internal Medicine, Angiology and Physical Medicine, Faculty of Medical Sciences in Zabrze, Medical University of Silesia, Bytom, Poland
4. Inter-University Research Centre on Vascular Diseases, University of Milan, Milan, Italy