1 Centro Cardiologico Monzino, IRCCS, Milan, Italy. Electronic address: gianluca.pontone@ccfm.it.
2 Loyola University of Chicago, Chicago, Illinois; Edward Hines Jr. Veteran's Affairs Hospital, Hines, Illinois.
3 Department of Biomedical Sciences, Humanitas University, Pieve Emanuele, Milan, Italy; Department of Diagnostic Imaging, Humanitas Clinical and Research Hospital, IRCCS, Rozzano, Milan, Italy.