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Nasopharynges
Otitis Media
Haemophilus Infections
Acute Disease
Pneumococcal Infections
Streptococcus pneumoniae
Haemophilus influenzae
Infants
Streptococcus pyogenes
Anti-Bacterial Agents
Bacterial Proteins
beta-Lactamases
Macrolides
Microbial Sensitivity Tests
Polymerase Chain Reaction
Serotyping
Bacterial Drug Resistance
Genotype
Ampicillin Resistance
Japan
Co-Publications
26
25
17
11
3
2
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