No abstract available
MeSH terms
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Anti-Bacterial Agents / pharmacology
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Clarithromycin / pharmacology*
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Drug Resistance, Microbial
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Helicobacter Infections / drug therapy*
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Helicobacter pylori / drug effects*
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Humans
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Metronidazole / pharmacology*
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Peptic Ulcer / drug therapy
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Peptic Ulcer / microbiology*
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Spain
Substances
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Anti-Bacterial Agents
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Metronidazole
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Clarithromycin