No abstract available
MeSH terms
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Disease Outbreaks / prevention & control
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Disease Outbreaks / statistics & numerical data*
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Female
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Humans
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Pregnancy
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Pregnancy Complications / epidemiology
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Pregnancy, Multiple / statistics & numerical data*
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Reproductive Techniques, Assisted / adverse effects
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Risk Factors
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Twins / statistics & numerical data
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United Kingdom / epidemiology
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United States / epidemiology
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Victoria / epidemiology