1. From the Division of Cardiovascular Medicine, Department of Internal Medicine, Columbia University, New York, NY (U.M.R.A.); Division of Cardiovascular Medicine, Department of Internal Medicine, Center for Arrhythmia Research (J.J.H., C.R.V., K.K., R.R.-M., J.A., H.H.V.) and Department of Surgery (A.R.-P.), University of Michigan, Ann Arbor; Medical Device Development and Regulation Research Center, The University of Tokyo, Japan (M.Y.); Department of Cardiology, Brown University, Providence, RI (A...