@misc{indiciae33a5a7ae4408,
  title = {Prothrombin activity.},
  author = {W H Jeffery},
  year = {1989},
  doi = {10.1097/00007611-198908000-00040},
  url = {https://pubmed.ncbi.nlm.nih.gov/2762893/},
  note = {Source identifier: 2762893}
}