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.
Bonow RO, Masoudi FA, Rumsfeld JS, Delong E, Estes NA, Goff DC, Grady K, Green LA, Loth AR, Peterson ED, Pi?a IL, Radford MJ, Shahian DM. 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. Circulation. 2008 Dec 09; 118(24):2662-6.