@misc{indiciae4e974b96cfb5,
  title = {Colour Doppler flow mapping.},
  author = {I A Simpson and A J Camm},
  year = {1990},
  doi = {10.1136/bmj.300.6716.1},
  url = {https://pubmed.ncbi.nlm.nih.gov/2105112/},
  note = {Source identifier: 2105112}
}