HIGHLIGHTS
- who: Inhaled corticosteroid influence toll and collaborators from the The ethnic review board of Ruijin hospital affiliated to Shanghai Jiaotong University school of medicine approved the study, and informed consent was obtained from all subjectsAccording to the Global Initiative for Chronic Obstructive Lung Disease (GOLD) and the Chinese guideline on Chronic Obstructive lung disease, severe stable COPD patients who were in stage III and IV with , less than, % predicted value were investigated in this study. Patients who had an exacerbation in the previous , weeks or who were hospitalized in the previous , months were excluded from the study . . .
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