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Balsan GA, Vieira JL, Oliveira AM, Portal VL.Balsan GA, et al. Among authors: portal vl.Rev Assoc Med Bras (1992). 2015 Jan-Feb;61(1):72-80. doi: 10.1590/1806-9282.61.01.072. Epub 2015 Jan 1.Rev Assoc Med Bras (1992). 2015.PMID: 25909213Free article.Review.
Grezzana GB, Vieira JL, Portal VL.Grezzana GB, et al. Among authors: portal vl.Rev Assoc Med Bras (1992). 2015 Sep-Oct;61(5):458-68. doi: 10.1590/1806-9282.61.05.458.Rev Assoc Med Bras (1992). 2015.PMID: 26603010Free article.Review.
da Rosa MP, Portal VL.da Rosa MP, et al. Among authors: portal vl.Rev Assoc Med Bras (1992). 2011 May-Jun;57(3):317-21.Rev Assoc Med Bras (1992). 2011.PMID: 21691697Free article.English, Portuguese.
Menti E, Zaffari D, Galarraga T, Lessa JR, Pontin B, Pellanda LC, Portal VL.Menti E, et al. Among authors: portal vl.Arq Bras Cardiol. 2016 Jun;106(6):457-63. doi: 10.5935/abc.20160060. Epub 2016 May 3.Arq Bras Cardiol. 2016.PMID: 27142650Free PMC article.