@misc{indiciae1737a55563da,
  title = {Letter: Bleeding and perioperative heparin.},
  author = {R McWilliam and J S McCormick and A Aulaqi},
  year = {1974},
  doi = {10.1016/s0140-6736(74)91445-7},
  url = {https://pubmed.ncbi.nlm.nih.gov/4135708/},
  note = {Source identifier: 4135708}
}