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Effects of QVAR in Smokers With Asthma
We hypothesize that extra-fine particle treatment with HFA-QVAR will be superior in improving small airways dysfunction, especially in ex-smokers and smokers with asthma. To investigate this, we will perform a study comparing the efficacy of extra-fine particle HFA-QVAR 200 µg b.i.d. to an equipotent dose of course particle HFA-beclomethasone (HFA-Clenil) 400 µg b.i.d. and with coarse particle HFA-fluticasone (GSK) 250 µg in ex-smokers and smokers with asthma. Study design: This study will be an open-label, randomised, three-way cross-over, two-center study. 20 smokers and 20 ex-smokers with asthma will receive the following treatments for two weeks:
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