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Is MTHFR 677 C>T Polymorphism Clinically Important in Polycystic Ovarian Syndrome (PCOS)? A Case-Control Study, Meta-Analysis and Trial Sequential Analysis

Fig 1

PRISMA flow diagram.

The flow diagrams shows screening of literature and selection of studies for meta-analysis.

Fig 1

doi: https://doi.org/10.1371/journal.pone.0151510.g001