Nishant R Shah1, David E Winchester2, Andrew M Freeman3. 1. Division of Cardiology, Department of Medicine, Brown University Alpert Medical School, Providence, RI, USA. 2. Cardiology Section, Malcom Randall VAMC, Department of Medicine, University of Florida College of Medicine, Gainesville, FL, USA. 3. Division of Cardiology, Department of Medicine, National Jewish Health, 1400 Jackson St. J317, Denver, CO, 80206, USA. andrew@docandrew.com.