Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Frederick E. Sieber and Sheila Ryan Barnett,Preventing Postoperative Complications in the Elderly,Anesthesiology Clinics,1932-2275,Elsevier BV,2011-03,29,1,83-97,https://cir.nii.ac.jp/crid/1360292620189108608,https://doi.org/10.1016/j.anclin.2010.11.011