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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6543465PMC
http://dx.doi.org/10.1513/AnnalsATS.201812-889RLDOI Listing

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Asthma is an obstructive lung disease with high prevalence. Symptom control in asthma remains poor despite significant advancements in treatment guidelines and inhalational devices. This is often attributed to inadequate patient adherence to the inhaler technique and insufficient education on its long-term use.

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Burden of Asthma Among a Sample of Primary Schoolchildren in Jordan Based on Child and Parental Report.

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