@misc{indiciae7e66ef6bbb4a,
  title = {Shiley heart valves.},
  author = {P Hedger},
  year = {1990},
  doi = {10.1016/0140-6736(90)92398-2},
  url = {https://pubmed.ncbi.nlm.nih.gov/1976914/},
  note = {Source identifier: 1976914}
}