@misc{indiciaefea834052290,
  title = {Left ventricular performance during exercise: response of ear densitogram derivative.},
  author = {B G Haffty and T Sugiura and N E O'Hare and D H Spodick},
  year = {1983},
  doi = {10.1016/0002-9149(83)90090-5},
  url = {https://pubmed.ncbi.nlm.nih.gov/6858907/},
  note = {Source identifier: 6858907}
}