@misc{indiciae08d6a2344892,
  title = {Echocardiography.},
  author = {J D Bonagura and D S Herring and F Welker},
  year = {1985},
  doi = {10.1016/s0749-0739(17)30758-7},
  url = {https://pubmed.ncbi.nlm.nih.gov/2934116/},
  note = {Source identifier: 2934116}
}