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Shapiro M, Moyers B, Marcus GM, Gerber IL, McKeown BH, Vessey JC, Jordan MV, Huddleston M, Foster E, Chatterjee K, Michaels AD.Shapiro M, et al.J Card Fail. 2007 Feb;13(1):18-24. doi: 10.1016/j.cardfail.2006.09.009.J Card Fail. 2007.PMID: 17338999