1. From the Division of Cardiology, Johns Hopkins University School of Medicine, Baltimore, MD (T.Z., E.G.I., R.H., H.A., R.D.B., J.E.M., D.D.S., H.T., H.H., H.C., C.H.); Department of Radiology and Radiological Sciences, Johns Hopkins Medicine, Baltimore, MD (S.L.Z., H.H.); Department of Biomedical Engineering, Johns Hopkins University, Baltimore, MD (H.H.); Department of Cardiology, Providence St. Vincent Medical Center, Portland, OR (S.B.); Division of Cardiology, Oregon Health Sciences University,...