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) HAPANI S,Risk of gastrointestinal perforation in patients with cancer treated with bevacizumab : a meta-analysis,Lancet Oncol,,,2009,10,,559-568,https://cir.nii.ac.jp/crid/1571980074951483648,