@misc{indiciaeac9e187dd3d3,
  title = {Digital echocardiography.},
  author = {M L Main and J D Thomas},
  year = {1998},
  doi = {10.1097/00001573-199811000-00004},
  url = {https://pubmed.ncbi.nlm.nih.gov/9822872/},
  note = {Source identifier: 9822872}
}