Detecting Bias with Confidence in Observational Studies. Rosenbaum, P. R. Biometrika, 79:367-374, 1992.  bibtex   @article{ros92det,
  title = {Detecting Bias with Confidence in Observational Studies},
  volume = {79},
  journal = {Biometrika},
  author = {Rosenbaum, Paul R.},
  year = {1992},
  keywords = {multiple-endpoints,study-design,observational-study,bias},
  pages = {367-374},
  citeulike-article-id = {13264759},
  posted-at = {2014-07-14 14:09:41},
  priority = {0}
} 
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