@misc{9394,
  author = {N. Davies and G. Smith and F. Windmeijer and R. Martin},
  title = {COX-2 selective nonsteroidal anti-inflammatory drugs and risk of gastrointestinal tract complications and myocardial infarction: an instrumental variable analysis},
  year = {2013},
  journal = {Epidemiology},
  volume = {24},
  number = {3},
  pages = {352-62},
  issn = {1044-3983},
  doi = {10.1097/EDE.0b013e318289e024},
}