@misc{10305,
  author = {R. Farmer and R. Lawrenson and J. Todd and T. Williams and K. MacRae and F. Tyrer and G. Leydon},
  title = {A comparison of the risks of venous thromboembolic disease in association with different combined oral contraceptives},
  year = {2000},
  journal = {Br J Clin Pharmacol},
  volume = {49},
  number = {6},
  pages = {580-90},
  issn = {0306-5251 (Print) 0306-5251},
}