1. Internistic Ultrasound Service, ‘Campus Bio‑Medico’ University of Rome, I-00128 Rome, Italy
2. Division of Vascular Surgery, ‘Campus Bio‑Medico’ University of Rome, I-00128 Rome, Italy
3. Colorectal Surgery Unit, ‘Campus Bio‑Medico’ University of Rome, I-00128 Rome, Italy
4. Interventional Cardiology Unit, Castelli Hospital, I-00040 Ariccia, Italy