1. From the Division of Cardiovascular Diseases, Cardiovascular Research Institute, University of Kansas Hospital and Medical Center, Kansas City, KS (Y.M.R., S.B., D.A., D.L.); Division of Cardiology, New York University School of Medicine, New York, NY (L.C.); Division of Cardiology, Massachusetts General Hospital, Boston, MA (M.M., J.R.); Intermountain Heart Institute, Salt Lake City, UT (T.J.B.); St. Jude Medical, St. Paul, MN (S.M.); Arizona Heart Rhythm Center, Phoenix, AZ (V.S.); Texas Cardiac...