1. Radiology Department of Surgery, Medicine and Pharmacy, University of Sassari, Viale S. Pietro, 07100 Sassari, Italy
2. Department of Radiology, James Cook University Hospital & Teesside University, Marton Road Marton Rd., Middlesbrough TS4 3BW, UK
3. Department of General and Emergency Radiology, “A. Cardarelli” Hospital, Via Cardarelli 9, 80100 Napoli, Italy
4. Department of Emergency Radiology, Cisanello Hospital, Via Cisanello, 56124 Pisa, Italy
5. Department of Radiology, Monaldi Hospital, 80131 Naples, Italy
6. Ospedale del Mare-ASL NA1 Centro, Via Enrico Russo, 11, 80147 Napoli, Italy
7. Department of Medical Sciences, University of Cagliari, 09124 Cagliari, Italy