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Machado PR, Farias KJ, Pereira MG, Freitas PP, Fonseca BA.Machado PR, et al.Sao Paulo Med J. 2015 Apr 14;134(3):187-92. doi: 10.1590/1516-3180.2014.8973010.Sao Paulo Med J. 2015.PMID: 25885486Free PMC article.