@book{ BB02837097,
  author    = "Guyatt, Gordon",
  title     = "Users' guides to the medical literature : a manual for evidence-based clinical practice",
  publisher = "McGraw Hill Medical/JAMA & Archives Journals",
  year      = "2008",
  edition   = "2nd ed",
  URL       = "https://ci.nii.ac.jp/ncid/BB02837097"
}