Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Goto Osamu and Yahagi Naohisa,Approach to Gastric Submucosal Tumor,Nihon Naika Gakkai Zasshi,00215384,The Japanese Society of Internal Medicine,2015,104,1,128-132,https://cir.nii.ac.jp/crid/1390282681426977408,https://doi.org/10.2169/naika.104.128