1. Vascular and Interventional Radiology Unit, Department of Radiological Sciences, Sapienza University of Rome, Rome, Italy
2. Department of General Surgery Paride Stefanini, Interventional Endoscopy Unit, Sapienza University of Rome, Rome, Italy
3. Department of General Surgery Paride Stefanini, Interventional Endoscopy Unit, Sapienza University of Rome, 324, Viale Regina Elena, 00161 Rome, Italy