No abstract available
MeSH terms
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Humans
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Infant
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Infant Welfare
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Infant, Newborn
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Injections, Intramuscular* / instrumentation
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Injections, Intramuscular* / methods
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Injections, Subcutaneous* / instrumentation
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Injections, Subcutaneous* / methods
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Needles / standards*
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Pain / etiology
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Pain / prevention & control
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United States
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Vaccination / instrumentation
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Vaccination / methods*