No abstract available
Publication types
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Letter
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Research Support, Non-U.S. Gov't
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Validation Study
MeSH terms
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Asthma / drug therapy*
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Clinical Trials as Topic / standards*
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Feasibility Studies
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Humans
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Medication Adherence*
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Metered Dose Inhalers / standards*
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Observer Variation
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Reproducibility of Results
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Time Factors