1. Division of Cardiovascular Medicine, Department of Medicine, University of Massachusetts Medical School, Worcester, MA;
2. Department of Medicine, and
3. Whitaker Cardiovascular Institute, Boston University School of Medicine, Boston, MA;
4. Division of Infectious Disease and Immunology, Department of Medicine, University of Massachusetts Medical School, Worcester, MA;
5. National Heart, Lung, and Blood Institute and Boston University's Framingham Heart Institute, Framingham, MA;
6. Division of Quantitative Health Sciences, Department of Medicine, University of Massachusetts Medical School, Worcester, MA; and
7. Evans Center for Interdisciplinary Biomedical Research, Boston University School of Medicine, Boston, MA