ACC/AHA classification of care metrics: performance measures and quality metrics: a report of the American College of Cardiology/American Heart Association Task Force on Performance Measures.
American College of Cardiology/American Heart Association Task Force on Performance Measures, Bonow RO, Masoudi FA, Rumsfeld JS, Delong E, Estes NA 3rd, Goff DC Jr, Grady K, Green LA, Loth AR, et al. Circulation. 2008 Dec 9; 118(24):2662-6. Epub 2008 Nov 12.