@misc{indiciae82fb03c2c971,
  title = {Early echocardiography.},
  author = {I Edler},
  year = {1991},
  doi = {10.1016/0301-5629(91)90178-y},
  url = {https://pubmed.ncbi.nlm.nih.gov/1962345/},
  note = {Source identifier: 1962345}
}