1. Center for Genomic Medicine and Cardiovascular Research Center, Massachusetts General Hospital, Boston (P.N., S.K.).
2. Program in Medical and Population Genetics and Cardiovascular Disease Initiative, Broad Institute of Harvard and MIT, Cambridge, MA (P.N., S.K.).
3. Department of Medicine, Harvard Medical School, Boston, MA (P.N., S.K.).
4. Department of Pathology, Stanford University, CA (S.J.).