No abstract available
MeSH terms
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Antibody Formation*
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Arthritis, Rheumatoid*
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Drug Therapy*
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Heart Diseases*
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Hemagglutination Inhibition Tests*
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Humans
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Nephritis*
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Penicillins*
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Rheumatic Fever*
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Rheumatic Heart Disease*
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Scarlet Fever*
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Streptococcal Infections*
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Streptococcus*