@misc{indiciae7969e8615b05,
  title = {Hybrid exercise echocardiograph.},
  author = {S N Berberich and J R Zager},
  year = {1981},
  doi = {10.1177/000331978103200101},
  url = {https://pubmed.ncbi.nlm.nih.gov/7469123/},
  note = {Source identifier: 7469123}
}