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Article
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Female
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Humans
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Male
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Middle Aged
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Muscarinic Antagonists
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Patient Acceptance of Health Care
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Pulmonary Disease, Chronic Obstructive
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Retrospective Studies
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aged
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antibiotic agent
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beta 2 adrenergic receptor stimulating agent
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chronic obstructive lung disease
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cohort analysis
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comparative study
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corticosteroid
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disease exacerbation
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economics
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emergency ward
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female
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health care cost
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health care utilization
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hospital patient
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human
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maintenance therapy
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major clinical study
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male
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medicare
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middle aged
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