@misc{indiciae1827a12ada74,
  title = {Doppler-estimated mitral valve area.},
  year = {1989},
  doi = {10.1016/0002-8703(89)90442-0},
  url = {https://pubmed.ncbi.nlm.nih.gov/2775356/},
  note = {Source identifier: 2775356}
}