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Infants
Newborn Infant
Streptococcus pneumoniae
Bacteremia
Pneumococcal Infections
Urinary Tract Infections
Philadelphia
Retrospective Studies
Risk Factors
Prevalence
Cross-Sectional Studies
Incidence
Sensitivity and Specificity
Prospective Studies
Hospitals, Pediatric
Emergency Service, Hospital
Pneumococcal Vaccines
Anti-Bacterial Agents
Case Control Studies
Serotyping
Co-Publications
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6
5
3
2
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