No abstract available
MeSH terms
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Advertising*
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Bronchitis / drug therapy
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Drug Industry*
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Expectorants / therapeutic use
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Glycerol / analogs & derivatives
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Glycerol / therapeutic use
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Humans
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Multicenter Studies as Topic*
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Peer Review / standards*
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Publishing / standards*
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Randomized Controlled Trials as Topic*
Substances
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Expectorants
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iodinated glycerol
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Glycerol