No abstract available
MeSH terms
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Aged
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Biopsy
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Bronchoscopy
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Carcinoma, Squamous Cell / diagnosis
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Carcinoma, Squamous Cell / pathology
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Cytodiagnosis
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Humans
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Lung Neoplasms / diagnosis*
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Lung Neoplasms / pathology
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Male
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Middle Aged
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Sputum / cytology
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Time Factors