Symptom相关论文
FEV1/FVCLessThanLowerLimitofNormalasSpirometricCriteriainDetectingChronicObstructivePu
目的 ToAssessthedifferencesofusingLLNcriterionindiagnosingCOPDcomparedwithGOLDfixed0.7criterion方法 Acrosssectionalstudy......