1 Diagnostic and Interventional Radiology, Department of Applied Clinical Sciences and Biotechnology, University of L'Aquila, L'Aquila, Italy.
2 Department of Medicine and Health Science "V. Tiberio," University of Molise, Campobasso, Italy.
3 Department of Radiology, University of Foggia, Foggia, Italy, and Department of Radiology, Scientific Institute Hospital, "Casa Sollievo della Sofferenza," S. Giovanni Rotondo, Foggia, Italy.