1. Center for Systems Biology and Department of Radiology, Massachusetts General Hospital and Harvard Medical School, Simches Research Building, Boston (F.F.H., M.J.S., D.R., C.S.A., Y.I., K.N., F.K.S., M.N.).
2. Pittsburgh Heart, Lung, Blood, and Vascular Medicine Institute, Division of Cardiology, Department of Medicine, University of Pittsburgh School of Medicine and University of Pittsburgh Medical Center, PA (X.Z., E.C., S.B.V., G.M., P.D.).
3. The Third Xiangya Hospital, Central South University, Changsha, Hunan, China (X.Z.).
4. Division of Cardiovascular Medicine, Department of Medicine, Brigham and Women’s Hospital and Harvard Medical School, Boston, MA (P.L.).
5. Cardiovascular Research Center, Massachusetts General Hospital and Harvard Medical School, Boston (M.N.).
6. Department of Internal Medicine I, University Hospital Würzburg, Germany (M.N.).