@misc{indiciaefa00a7a10a3b,
  title = {Variation in left ventricular ejection fraction determination at rest and during exercise.},
  author = {A van Aswegen and C P Herbst and M G Lötter and A C Otto and P H Kleynhans and P C Minnaar},
  year = {1983},
  url = {https://pubmed.ncbi.nlm.nih.gov/6857409/},
  note = {Source identifier: 6857409}
}