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Background: Asthma is a common and costly condition. Concomitant asthma and allergic rhinitis (AR) have been shown to increase the medication costs for people with asthma. No studies have compared medical care costs of those with and without concomitant AR. Objectives: We sought to determine the prevalence and incremental medical care costs of concomitant AR. Methods: For each member of a population-based...
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