1. Vascular Surgery Unit, Department of Public Health, University Federico II of Naples, 80138 Naples, Italy
2. General Surgery Unit, Department of Public Health, University Federico II of Naples, 80138 Naples, Italy
3. General Surgery Unit, Sant’Ottone Frangipane Hospital, 83100 Avellino, Italy
4. Department of Medical and Surgical Sciences, University Magna Graecia of Catanzaro, 88100 Catanzaro, 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