No abstract available
MeSH terms
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Adolescent
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Adult
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Bronchi / pathology*
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Bronchial Diseases / pathology*
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Clinical Trials as Topic
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Epithelium / pathology
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Female
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Humans
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Male
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Metaplasia / pathology
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Middle Aged
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Music*
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Precancerous Conditions / pathology*
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Sputum / cytology
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Voice*