@misc{indiciaecf684a1328fb,
  title = {Two-dimensional echocardiography.},
  author = {J B Seward and A J Tajik},
  year = {1980},
  doi = {10.1016/s0025-7125(16)31614-5},
  url = {https://pubmed.ncbi.nlm.nih.gov/6446009/},
  note = {Source identifier: 6446009}
}