This tool was derived from Wang TJ, et al. (2003). A risk score for predicting stroke or death in individuals with new-onset atrial fibrillation in the community: The Framingham heart study. JAMA, 290(8): 1049–1056. The Framingham Heart Study is a project of the National Heart, Lung, and Blood Institute, a part of the National Institutes of Health and the U.S. Department of Health and Human Services, and Boston University. More information is available online at www.framinghamheartstudy.org.