@misc{9767,
  author = {T. van Staa and H. Leufkens and B. Zhang and L. Smeeth},
  title = {A comparison of cost effectiveness using data from randomized trials or actual clinical practice: selective cox-2 inhibitors as an example},
  year = {2009},
  journal = {PLoS Med},
  volume = {6},
  number = {12},
  pages = {e1000194},
  issn = {1549-1277},
  doi = {10.1371/journal.pmed.1000194},
}