No abstract available
Publication types
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Comparative Study
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Research Support, Non-U.S. Gov't
MeSH terms
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Adult
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Exercise Tolerance / physiology
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Female
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Forced Expiratory Volume / physiology*
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Health Surveys
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Humans
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Male
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Middle Aged
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Motor Activity / physiology*
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Physical Exertion / physiology
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Predictive Value of Tests
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Severity of Illness Index
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Smoking / physiopathology
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United States / epidemiology
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Vital Capacity / physiology