著者名,論文名,雑誌名,ISSN,出版者名,出版日付,巻,号,ページ,URL,URL(DOI) Donald P Tashkin and Gary T Ferguson,Combination bronchodilator therapy in the management of chronic obstructive pulmonary disease,Respiratory Research,1465-9921,Springer Science and Business Media LLC,2013,14,1,49,https://cir.nii.ac.jp/crid/1360292618999156096,https://doi.org/10.1186/1465-9921-14-49