1 Section of Cardiovascular Medicine, Department of Medicine, Boston Medical Center, Boston University School of Medicine, Boston, Massachusetts.
2 University Heart Center Hamburg, Clinic for General and Interventional Cardiology, Hamburg, Germany; German Center for Cardiovascular Research (DZHK e.V.), partner site Hamburg, Lübeck, Kiel, Germany.
3 Department of Biostatics, Boston University School of Public Health, Boston, Massachusetts.
4 Section of Cardiovascular Medicine, Department of Medicine, Boston Medical Center, Boston University School of Medicine, Boston, Massachusetts; Section of Preventive Medicine, Department of Medicine, Boston University School of Medicine, and Department of Epidemiology, Boston University School of Public Health, Boston, Massachusetts; Boston University and National Heart, Lung, and Blood Institute's Framingham Heart Study, Framingham, Massachusetts. Electronic address: emelia@bu.edu.