著者名,論文名,雑誌名,ISSN,出版者名,出版日付,巻,号,ページ,URL,URL(DOI) YEUNG CK.,Helicobacter pylori and associated duodenal ulcer,Arch Dis Child,,,1990,65,,1212-1216,https://cir.nii.ac.jp/crid/1572543024603205248,