1. AdvocateAuroraHealth, Naperville, IL (V.J.B.).
2. Robert J. Margolis, MD, Center for Health Policy, Duke University, Washington, DC and Durham, NC (W.K.B., E.A.S., B.B.G., E.C.O., M.H.L., R.S.S., M.B.M.).
3. Department of Neurology, Vagelos College of Physicians and Surgeons, and Department of Epidemiology, Mailman School of Public Health, Columbia University, New York, NY (M.S.V.E.).
4. American Heart Association, Dallas, TX (N.B.).