@misc{indiciaeab4682792316,
  title = {Noninvasive evaluation of left ventricular function: the ejection fraction.},
  author = {E D Folland and A F Parisi},
  year = {1979},
  url = {https://pubmed.ncbi.nlm.nih.gov/477284/},
  note = {Source identifier: 477284}
}