1. Cardiovascular Division, John T. Milliken Department of Internal Medicine, Washington University School of Medicine, and Center for Health Economics and Policy, Institute for Public Health at Washington University, St. Louis, MO (K.J.M.).
2. Robert J. Margolis, MD, Center for Health Policy, Duke University, Washington, DC and Durham, NC (W.K.B., H.L.C., M.H.L., R.S.S., M.B.M.).
3. Duke Clinical Research Institute, Duke University, Durham, NC (A.J.N.).
4. American Heart Association, Dallas, TX (N.B.).