@misc{indiciaeb6e99122770b,
  title = {Variation in Doppler-derived stenotic aortic valve area during ejection.},
  author = {T R Lloyd},
  year = {1992},
  doi = {10.1016/0002-8703(92)90628-9},
  url = {https://pubmed.ncbi.nlm.nih.gov/1636603/},
  note = {Source identifier: 1636603}
}