1. From the Unit of Radiology, IRCCS Policlinico San Donato, San Donato Milanese, Italy (S.S., L.A.C., G.D.L., F.S.); Unit of Radiology, IRCCS Policlinico San Martino, Genoa, Italy (M.C.); Unit of Radiology, Ente Ospedaliero Ospedali Galliera, Genoa, Italy (E.F.M.); and Department of Biomedical Sciences for Health, Università degli Studi di Milano, Via Mangiagalli 31, 20133 Milan, Italy (R.M.T., A.C., F.S.).