@misc{indiciae97409e0e8a7d,
  title = {Human prothrombin activation.},
  author = {M R Downing and R J Butkowski and M M Clark and K G Mann},
  year = {1975},
  url = {https://pubmed.ncbi.nlm.nih.gov/1238394/},
  note = {Source identifier: 1238394}
}