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Letters to the editor
Bronchodilator responsiveness testing in young children
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Editor,—There is some concern that asthma may be misdiagnosed when reported symptoms only are considered.1In Britain, asthma is usually diagnosed without any lung function testing whereas in the USA, measurement of bronchodilator responsiveness (BDR) is recommended.2 Perhaps routine spirometry is perceived as impractical. If lung function testing is to be recommended for the …