@misc{9051,
  author = {D. Springate and D. Ashcroft and E. Kontopantelis and T. Doran and R. Ryan and D. Reeves},
  title = {Can analyses of electronic patient records be independently and externally validated? Study 2\textendashthe effect of beta-adrenoceptor blocker therapy on cancer survival: a retrospective cohort study},
  year = {2015},
  journal = {BMJ Open},
  volume = {5},
  number = {4},
  pages = {e007299},
  issn = {2044-6055},
  doi = {10.1136/bmjopen-2014-007299},
}