@misc{indiciae898e78ab3eda,
  title = {Exercise echocardiography.},
  author = {S N Berberich and J R Zager},
  year = {1988},
  doi = {10.1016/0735-1097(88)90344-0},
  url = {https://pubmed.ncbi.nlm.nih.gov/3403856/},
  note = {Source identifier: 3403856}
}