No abstract available
Publication types
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Clinical Trial
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Comparative Study
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Controlled Clinical Trial
MeSH terms
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Clinical Trials as Topic
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Evaluation Studies as Topic
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Humans
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Lung Diseases, Obstructive / diagnosis*
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Lung Diseases, Obstructive / diagnostic imaging
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Radiography
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Radioisotopes
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Radionuclide Imaging*
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Ventilation-Perfusion Ratio*
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Xenon