@misc{indiciaef8022dac7deb,
  title = {Thromboplastin reference preparations.},
  author = {L Poller},
  year = {1971},
  doi = {10.1136/bmj.3.5775.638-c},
  url = {https://pubmed.ncbi.nlm.nih.gov/5569990/},
  note = {Source identifier: 5569990}
}