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Raskin E, Paula JS, Cruz AA, Coelho RP.Raskin E, et al. Among authors: cruz aa.Arq Bras Oftalmol. 2010 Nov-Dec;73(6):508-10. doi: 10.1590/s0004-27492010000600008.Arq Bras Oftalmol. 2010.PMID: 21271025Free article.Clinical Trial.