1 Department of Medicine, Division of Cardiology, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania; Cardiovascular Magnetic Resonance Center, Heart and Vascular Institute, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania. Electronic address: wongtc@upmc.edu.
2 Department of Medicine, Division of Cardiology, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania; Advanced Heart Failure and Transplantation, Heart and Vascular Institute, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania.