1. From the Department of Pathology (A.A., J.E.S.) and Department of Medicine (S.G.), Beth Israel Deaconess Medical Center and Harvard Medical School, the Department of Medicine (J.R.W., W.G.S.), Brigham and Women's Hospital and Harvard Medical School, and Department of Pathology, Boston University Medical Center (E.R.D., D.G.R.), Boston, MA; Department of Medicine, Johns Hopkins Medical Institutions, Baltimore, MD (H.T., H.C.); Jesse E. Edwards Registry of Cardiovascular Diseases, St Paul, MN (S.M.-B....