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Population Surveillance
Chromosome Mapping
Prenatal Care
Folic Acid
DNA, Satellite
Newborn Infant
Infants
European Continental Ancestry Group
African Continental Ancestry Group
Neural Tube Defects
Alzheimer's Disease
Pregnancy
Honduras
United States
South Carolina
Fortified Food
Prevalence
Ethnic Groups
Gene Frequency
Chromosomes, Human, X
Co-Publications
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