Department of Surgical and Medical Sciences, University of Catanzaro, Catanzaro, Italy.|Department of Surgical and Medical Sciences, University of Catanzaro, Catanzaro, Italy. hguzzi@unicz.it.|Department of Radiology University of California, San Francisco, USA.|Department of Radiology University of California, San Francisco, USA.|Department of Radiology University of California, San Francisco, USA.|Department of Surgical and Medical Sciences, University of Catanzaro, Catanzaro, Italy.|Department of Surgical and Medical Sciences, University of Catanzaro, Catanzaro, Italy.