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) COHEN ME,Risk adjustment in the American College of Surgeons National Surgical Quality Improvement Program : a comparison of logistic versus hierarchical modeling,J Am Coll Surg,,,2009,209,,687-693,https://cir.nii.ac.jp/crid/1572543024877429376,