@misc{indiciaeb2109278e0d5,
  title = {A simplified method of echocardiographic data analysis.},
  author = {R M Schieken and H R Jordan and W Clarke and R M Lauer},
  year = {1977},
  doi = {10.1002/ccd.1810030113},
  url = {https://pubmed.ncbi.nlm.nih.gov/837429/},
  note = {Source identifier: 837429}
}