HIGHLIGHTS
- who: Yuling Yang from the This prospective study was approved by the Ethics Committee of Huadong Hospital Affiliated to Fudan University (No, ), and informed consents were obtained from all patients. The study is based on a retrospective interpretation of prospectively acquired data. From July , to May, participants who came for annual health screening without respiratory symptoms at our hospital were enrolled in the study. Subjects who met any of following criteria were considered for inclusion from the analysis with normal lung function results u00ad (FEV1/FVC >, ., and u00adFEV1%pred >, %), age > , years, no history of asthma or interstitial . . .
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