@misc{indiciaeac50b412b0ee,
  title = {The study of left ventricular function from digitized echocardiograms.},
  author = {M T Upton and D G Gibson},
  doi = {10.1016/0033-0620(78)90003-8},
  url = {https://pubmed.ncbi.nlm.nih.gov/635214/},
  note = {Source identifier: 635214}
}