No abstract available
MeSH terms
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Adenocarcinoma / diagnostic imaging*
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Adenocarcinoma / epidemiology
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Carcinoma, Bronchogenic / diagnostic imaging*
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Carcinoma, Bronchogenic / epidemiology
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Carcinoma, Squamous Cell / diagnostic imaging*
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Carcinoma, Squamous Cell / epidemiology
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Fluoroscopy
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Humans
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Lung Neoplasms / diagnostic imaging*
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Lung Neoplasms / epidemiology
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Male
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Middle Aged
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Pennsylvania
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Photography
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Prospective Studies
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Time Factors