@article{9162,
  author = {Stephen M. Shortell and Sara J. Singer},
  title = {Improving patient safety by taking systems seriously.},
  year = {2008},
  journal = {JAMA},
  volume = {299},
  pages = {445-447},
  month = {01/2008},
  issn = {1538-3598},
  doi = {10.1001/jama.299.4.445},
  language = {eng},
}