Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Yuzo Suzuki and Katsuhiro Yoshimura and Tomohiro Uto and Jun Sato and Shiro Imokawa and Takafumi Suda,Morphological changes in small pulmonary vessels are associated with severe acute exacerbation in chronic obstructive pulmonary disease,International Journal of Chronic Obstructive Pulmonary Disease,1178-2005,Informa UK Limited,2016-06,Volume 11,,1435-1445,https://cir.nii.ac.jp/crid/1360848663378449664,https://doi.org/10.2147/copd.s107424