1. From the Interventional Cardiology Department, San Raffaele Scientific Institute, Milan, Italy (V.F.P., M.M., F.F., R.C., G.G., E.A., A.F., A.L., A.C.); Interventional Cardiology Unit, EMO-GVM Centro Cuore Columbus, Milan, Italy (V.F.P., R.C., G.G., A.L., A.C.); National Heart and Lung Institute, Imperial College London, London, United Kingdom (V.F.P.); and Radiology Department, San Raffaele Scientific Institute, Milan, Italy (P.S.).