Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI)
RUTTEN FH,Beta-blockers may reduce mortality and risk of exacerbations in patients with chronic obstructive pulmonary disease,Arch Intern Med,,,2010,170,,880-887,https://cir.nii.ac.jp/crid/1571980075722019840,