No abstract available
Publication types
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Comment
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Letter
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Research Support, U.S. Gov't, P.H.S.
MeSH terms
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Child
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Cognition Disorders / diagnosis*
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Cognition Disorders / etiology*
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Empirical Research*
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Humans
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Mutism / complications*
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Mutism / genetics
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Neuropsychological Tests
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Severity of Illness Index
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Twin Studies as Topic
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Twins, Dizygotic / genetics