Relevance of allergens from cats and dogs to asthma in the northernmost province of Sweden: Schools as a major site of exposure

Background: The prevalence of asthma in the northernmost region of Sweden has been estimated at 6% to 8% in spite of the very dry climate. The causes of the increase in asthma are not clear, but conditions are unfavorable for dust mite growth, and domestic animals are thought to be the primary sourc...

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