From the Center for Computational Health, IBM Research, T.J. Watson Research Center, Cambridge, MA (K.N.); Cardiovascular Wellness, Geisinger Health System, Danville, PA (S.R.S.); Digital Medicine, Scripps Health, San Diego, CA (S.R.S.); Cardiology, Inova Heart and Vascular Institute, Fairfax, VA (C.d.); Center for Computational Health, IBM Research, T.J. Watson Research Center, Yorktown Heights, NY (S.D.); and Research, Sutter Health Research, Walnut Creek, CA (W.F.S.). (At 2016-11)