Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Okamura Tatsuru and Kawamata Nakaaki and Ieki Ryuuji and Hirayama Masakiyo and Gotoh Hazime and Kudoh Shouji,"Prevalence, usefulness and problems of liquid oxygen system in long-term home oxygen therapy",The Journal of the Japan Society for Respiratory Care and Rehabilitation,1881-7319,The Japan Society for Respiratory Care and Rehabilitation,1992-03-31,1,2,43-47,https://cir.nii.ac.jp/crid/1390285300187133696,https://doi.org/10.15032/jsrcr.1.2_43