DOI:
10.1055/s-00030576
Revista Brasileira de Ginecologia e Obstetrícia / RBGO Gynecology and Obstetrics
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References
Moher D, Liberati A, Tetzlaff J, Altman DG. ; PRISMA Group.
Preferred reporting items for systematic reviews and meta-analyses: the PRISMA statement.
BMJ 2009;
339: b2535 . Doi: 10.1136/bmj.b2535
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