1. U.O. Medicina d’Urgenza e Pronto Soccorso, Emergency Department, Azienda Ospedaliero-Universitaria Pisana, Pisa, Italy
2. Division of General and Transplant Surgery, University of Pisa, Pisa, Italy
3. Diagnostic and Interventional Radiology, University of Pisa, Via Paradisa, Pisa, Italy