@misc{indiciae12614097142f,
  title = {Cardiac function following prosthetic aortic valve replacement.},
  author = {H N Hultgren and H Hubis and N Shumway},
  year = {1969},
  doi = {10.1016/0002-8703(69)90542-0},
  url = {https://pubmed.ncbi.nlm.nih.gov/4238070/},
  note = {Source identifier: 4238070}
}