@misc{10347,
  author = {R. Lawrenson and R. Farmer},
  title = {Venous thromboembolism and combined oral contraceptives: does the type of progestogen make a difference?},
  year = {2000},
  journal = {Contraception},
  volume = {62},
  number = {2 Suppl},
  pages = {21S-28S; discussion 37S-38S},
  issn = {0010-7824 (Print) 0010-7824},
}