No abstract available
MeSH terms
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Adolescent
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Adult
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Aged
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Apnea
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Female
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Helium
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Humans
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Lung Diseases / physiopathology*
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Male
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Methods
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Middle Aged
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Pulmonary Alveoli / physiology
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Pulmonary Alveoli / physiopathology*
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Respiration
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Respiratory Function Tests*
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Spirometry
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Time Factors