No abstract available
MeSH terms
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Adolescent
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Adult
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Age Factors
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Aged
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Antistreptolysin / blood*
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Child
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Child, Preschool
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Culture Media
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Humans
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Infant
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Methods
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Middle Aged
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Pharynx / microbiology*
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Rheumatic Fever / epidemiology*
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Spain
Substances
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Culture Media
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Antistreptolysin