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Newborn Infant
Infants
Premature Infant
Pain Measurement
Prospective Studies
Reproducibility of Results
Pain
Very Low Birth Weight Infant
Heart Rate
Facial Expression
Premature Birth
Infant Behavior
Gestational Age
Child Development
Pregnancy
Movement
Wakefulness
Intensive Care Units, Neonatal
Hydrocortisone
Saliva
Co-Publications
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25
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12
9
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6
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