No abstract available
Publication types
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Research Support, Non-U.S. Gov't
MeSH terms
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Endorphins / blood*
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Fetal Blood / analysis
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Humans
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Infant, Newborn*
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Time Factors
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beta-Endorphin
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beta-Lipotropin / blood*
Substances
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Endorphins
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beta-Endorphin
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beta-Lipotropin