1 Diagnostic and Interventional Radiology Department, Fondazione IRCCS Cà Granda, Ospedale Maggiore Policlinico, Via Francesco Sforza 35, 20122, Milan, Italy. amierardi@yahoo.it.
2 Diagnostic and Interventional Radiology Department, Fondazione IRCCS Cà Granda, Ospedale Maggiore Policlinico, Via Francesco Sforza 35, 20122, Milan, Italy.
3 Department of Health Sciences, University of Milan, Milan, Italy.