No abstract available
MeSH terms
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Age Factors
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Attention
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Child
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Child Behavior*
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Child Development*
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Child, Preschool
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Crying
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Emotions
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Facial Expression
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Female
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Genetics, Behavioral
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Genotype
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Humans
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Infant
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Male
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Pregnancy
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Sex Factors
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Sleep
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Social Behavior
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Speech
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Twins*