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Tanzania
HIV Infections
Pregnancy Complications, Infectious
Vertical Infectious Disease Transmission
Pregnancy
Disease Progression
HIV-1
Newborn Infant
Infants
Vitamins
Vitamin A
Risk Factors
Pregnancy Outcomes
Cohort Studies
Viral Load
Prospective Studies
Dietary Supplements
CD4 Lymphocyte Count
Double-Blind Method
HIV Seropositivity
Co-Publications
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