1 UOC Radiology and Neuroradiology, Department of Diagnostic Imaging, Oncological Radiotherapy and Hematology, A. Gemelli University Hospital Foundation, IRCCS, Rome, Italy. Electronic address: andrea.alexandre@libero.it.
2 UOC Radiology and Neuroradiology, Department of Diagnostic Imaging, Oncological Radiotherapy and Hematology, A. Gemelli University Hospital Foundation, IRCCS, Rome, Italy.