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Article
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China
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Coal combustion
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Hair
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Neural tube defect
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Risk
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Thorium
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adult
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anencephalus
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case control study
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coal
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combustion
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conception
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controlled study
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cooking
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encephalocele
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female
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fetus
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first trimester pregnancy
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folic acid
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hair analysis
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hair growth
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hair level
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human
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indoor air pollution
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inductively coupled plasma mass spectrometry
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major clinical study
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maternal age
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maternal exposure
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neural tube defect
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