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Providência R, Mota P, Pais JR, Leitão-Marques AM.Providência R, et al.Rev Port Cardiol. 2007 Feb;26(2):149-58.Rev Port Cardiol. 2007.PMID: 17479710English, Portuguese.
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Providência R, Quintal N, Costa M, Botelho A, Silva J, Seca L, Rebelo L, Leitão-Marques A.Providência R, et al.Rev Port Cardiol. 2008 Oct;27(10):1263-73.Rev Port Cardiol. 2008.PMID: 19178028English, Portuguese.
Providência R, Botelho A, Quintal N, Costa M, Quaresma A, Lopes P, Quintal I, Santos MJ, Santos AP, Leitão-Marques A.Providência R, et al.Rev Port Cardiol. 2009 Oct;28(10):1087-96.Rev Port Cardiol. 2009.PMID: 20058776English, Portuguese.