No abstract available
MeSH terms
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Communicable Disease Control*
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Ethylenediamines*
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Humans
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Penicillin G Benzathine*
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Penicillin G Procaine*
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Penicillin G*
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Placebos*
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Procaine*
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Syphilis*
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Tetracycline*
Substances
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Ethylenediamines
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Placebos
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Penicillin G Procaine
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Procaine
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benzathine
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Tetracycline
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Penicillin G
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Penicillin G Benzathine