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Objective Fraction of exhaled nitric oxide (FENO) has been proposed as a non-invasive biomarker for allergic inflammation seen in asthma. Many asthmatics in clinical practice have never had spirometry and recent data report misdiagnoses in patients with physician diagnosed (PD) asthma. The aim of this study was to assess the ability of FENO to discriminate between those with and without airflow obstruction...
Purpose Clinical diagnosis of severe asthma and chronic obstructive lung disease (COPD) remains a challenge and often flawed with lack of objective confirmation of airflow obstruction (AO). Misdiagnosis of asthma and COPD has been reported in stable disease, data are non-existent in frequent exacerbators. We investigated misdiagnosis and its predictors in frequent exacerbators. Methods The cohort...
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