Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Shiraishi Masashi,The usefulness of respiratory muscle assessment with ultrasonography in patients with COPD,The Journal of the Japan Society for Respiratory Care and Rehabilitation,1881-7319,The Japan Society for Respiratory Care and Rehabilitation,2022-12-26,31,1,15-20,https://cir.nii.ac.jp/crid/1390857512439761920,https://doi.org/10.15032/jsrcr.31.15