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Pregnancy
Gestational Age
Newborn Infant
Spontaneous Abortion
Very Low Birth Weight Infant
HIV Infections
Chromosome Aberrations
Risk Factors
Odds Ratio
20th Century History
Premature Infant
Prospective Studies
Multivariate Analysis
Logistic Models
Epidemiology
Epidemiologic Methods
Case Control Studies
Echoencephalography
New York City
Thyroxine
Co-Publications
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