Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) TAKIZAWA Masami and YAMAMOTO Yasuhiro,Influence of factors comorbidity and related to surgery on the usage of medical resources in patients undergoing surgery for gastric malignancy,Journal of Biomedical Fuzzy Systems Association,13451537,Biomedical Fuzzy Systems Association,2015,17,1,1-8,https://cir.nii.ac.jp/crid/1390282679452859392,https://doi.org/10.24466/jbfsa.17.1_1