No abstract available
MeSH terms
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Abortion, Induced / adverse effects*
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Adult
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Age Factors
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Bias
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Breast Neoplasms / epidemiology*
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Breast Neoplasms / etiology*
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China / epidemiology
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Cohort Studies
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Female
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Humans
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Odds Ratio
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Parity
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Pregnancy
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Prevalence
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Reproducibility of Results
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Research Design
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Risk Factors