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Barros JG, Reis I, Pereira I, Clode N, Graça LM.Barros JG, et al.Rev Bras Ginecol Obstet. 2016 Jan;38(1):4-8. doi: 10.1055/s-0035-1570110.Rev Bras Ginecol Obstet. 2016.PMID: 26814688Free PMC article.