@misc{indiciae96dc15754d8b,
  title = {Quantitation of left ventricular function by two-dimensional echocardiography.},
  author = {R S Meltzer and O L Bastiaans and J Roelandt},
  year = {1981},
  url = {https://pubmed.ncbi.nlm.nih.gov/6977968/},
  note = {Source identifier: 6977968}
}