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O'Gara PT, Messe SR, Tuzcu EM, Catha G, Ring JC; American Heart Association; American Stroke Association; American College of Cardiology Foundation.O'Gara PT, et al.J Am Coll Cardiol. 2009 May 26;53(21):2014-8. doi: 10.1016/j.jacc.2009.04.001.J Am Coll Cardiol. 2009.PMID: 19460622Free article.