Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Higuchi Taeko and Ota Kyuma and Tanabe Yoshinari and Suzuki Eiichi and Gejyo Fumitake,Severity classification and prognosis in hospitalized elderly patients with community-acquired pneumonia,Nippon Ronen Igakkai Zasshi. Japanese Journal of Geriatrics,03009173,The Japan Geriatrics Society,2007,44,4,483-489,https://cir.nii.ac.jp/crid/1390282680002368640,https://doi.org/10.3143/geriatrics.44.483