@misc{indiciaed0aef28728b7,
  title = {Association between oral contraceptive use and thromboembolism: a new approach to itsinvestigation based on plasma fibrinogen chromatography.},
  author = {N Alkjaersig and A Fletcher and R Burstein},
  year = {1975},
  doi = {10.1016/s0002-9378(16)33492-5},
  url = {https://pubmed.ncbi.nlm.nih.gov/50741/},
  note = {Source identifier: 50741}
}