1. Division of General Internal Medicine, Massachusetts General Hospital, Boston, MA, USA (JBM); Harvard Medical School, Boston, MA, USA (JBM, AB); Center for Innovation in Digital HealthCare, Massachusetts General Hospital, Boston, MA, USA (TXVB); Department of Biostatistics, Informatics, and Epidemiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA (CBG); and Division of Cardiology, Massachusetts General Hospital, Boston, MA, USA (JAP, AB)