Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Pierre Ernst and Nathalie Saad and Samy Suissa,Inhaled corticosteroids in COPD: the clinical evidence,European Respiratory Journal,0903-1936,European Respiratory Society (ERS),2014-12-23,45,2,525-537,https://cir.nii.ac.jp/crid/1363388845609692288,https://doi.org/10.1183/09031936.00128914