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Otitis Media
Acute Disease
Maternal Exposure
Prenatal Exposure Delayed Effects
Respiratory Tract Infections
Streptococcus pneumoniae
Newborn Infant
Infants
Fetal Blood
Antibodies, Bacterial
Immunoglobulin G
Cotinine
Creatine
Prospective Studies
Age of Onset
Multivariate Analysis
Risk Factors
Maternal Age
Pregnancy
Serotyping
Co-Publications
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