@misc{indiciae9b25b8ea7da3,
  title = {Heparin and Christmas facfactor.},
  author = {J R O'BRIEN},
  year = {1958},
  doi = {10.1038/1811801b0},
  url = {https://pubmed.ncbi.nlm.nih.gov/13566150/},
  note = {Source identifier: 13566150}
}