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Barbosa MM, Freire CM, Nascimento BR, Rochitte CE, Silva MC, Siqueira MH, Nunes MC.Barbosa MM, et al.Rev Port Cardiol. 2012 Apr;31(4):287-93. doi: 10.1016/j.repc.2012.02.002. Epub 2012 Mar 13.Rev Port Cardiol. 2012.PMID: 22417720Free article.