@misc{indiciaea4fd2d23e8e4,
  title = {A new, simplified and accurate method for determining ejection fraction with two-dimensional echocardiography.},
  author = {M A Quinones and A D Waggoner and L A Reduto and J G Nelson and J B Young and W L Winters and L G Ribeiro and R R Miller},
  year = {1981},
  doi = {10.1161/01.cir.64.4.744},
  url = {https://pubmed.ncbi.nlm.nih.gov/7273375/},
  note = {Source identifier: 7273375}
}