Methods to Assess Intended Effects of Drug Treatment in Observational Studies Are Reviewed. Klungel, O. H.; Martens, E. P.; Psaty, B. M.; Grobbee, D. E.; Sullivan, S. D.; Stricker, B. H.; Leufkens, H. G. M.; and de Boer , A. J Clin Epi, 57:1223-1231, 2004.
bibtex   
@article{Klu04met,
  title = {Methods to Assess Intended Effects of Drug Treatment in Observational Studies Are Reviewed},
  volume = {57},
  journal = {J Clin Epi},
  author = {Klungel, Olaf H. and Martens, Edwin P. and Psaty, Bruce M. and Grobbee, Diederik E. and Sullivan, Sean D. and Stricker, Bruno H. and Leufkens, Hubert G. M. and {de Boer}, A.},
  year = {2004},
  keywords = {instrumental-variables,propensity-score,multivariate-confounder-score,observational-treatment-comparisons,selection-models},
  pages = {1223-1231},
  citeulike-article-id = {13265397},
  posted-at = {2014-07-14 14:09:55},
  priority = {0}
}
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