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Girotra S, Lu X, Popescu I, Vaughan-Sarrazin M, Horwitz PA, Cram P.Girotra S, et al. Among authors: cram p.Circ Cardiovasc Qual Outcomes. 2010 Nov;3(6):607-14. doi: 10.1161/CIRCOUTCOMES.110.943282. Epub 2010 Oct 5.Circ Cardiovasc Qual Outcomes. 2010.PMID: 20923993Free PMC article.