1. Department of Public Health, Vascular Surgery Unit, University Federico II of Naples, 80131 Naples, Italy
2. Department of Medicine, Surgery and Dentistry, University of Salerno, 84084 Fisciano, Italy
3. Department of Cardiac, Thoracic and Vascular Sciences and Public Health, School of Medicine, Padua University Hospital, 35100 Padua, Italy
4. Vascular and Endovascular Surgery, IRCCS Ospedale Policlinico San Martino, University of Genova, 16100 Genova, Italy
5. Interuniversity Center of Phlebolymphology (CIFL), International Research and Educational Program in Clinical and Experimental Biotechnology, University Magna Graecia of Catanzaro, 88100 Catanzaro, Italy