1. Division of Epidemiology, Department of Medicine, Vanderbilt Center for Translational and Clinical Cardiovascular Research, Vanderbilt University Medical Center, Nashville, Tennessee;
2. Department of Medicine, Beth Israel Deaconess Medical Center, Boston, MA;
3. Center for Health Sciences, Biosciences Division, SRI International, Menlo Park, CA;
4. Stanford Prevention Research Center, Department of Medicine, Stanford University School of Medicine, Stanford, CA;
5. Department of Medical and Molecular Genetics, Indiana University School of Medicine, Indianapolis, IN