1. Department of Clinical Medicine and Surgery – University Federico II of Naples, Italy – via S. Pansini, 5 - 80131Naples, Italy
2. Interuniversity Center of Phlebolymphology (CIFL), International Research and Educational Program in Clinical and Experimental Biotechnology, Catanzaro, Italy
3. Department of Cardio-thoracic and Respiratory Sciences - University of Campania "Luigi Vanvitelli", Naples - via S. Pansini, 5 - 80131Naples, Italy
4. Department of Medicine, Surgery and Dentistry, University of Salerno, Salerno, Italy
5. Unit of Vascular Surgery, S. Anna Hospital, Via Aldo Moro 8, Ferrara, Italy