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Infants
Newborn Infant
North American Indians
HIV-1
Young Adult
HIV Infections
Vertical Infectious Disease Transmission
Incidence
Risk Factors
Cohort Studies
Prevalence
Time Factors
Zimbabwe
Uganda
United States
Brazil
Breast Feeding
Pregnancy
Vitamin A
Circumcision, Male
Co-Publications
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19
17
14
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12
11
10
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