@misc{indiciae27a9fe535927,
  title = {Technique for visualization of the functioning mitral valve.},
  author = {W G Marshall},
  year = {1990},
  doi = {10.1016/0003-4975(90)90894-c},
  url = {https://pubmed.ncbi.nlm.nih.gov/2369175/},
  note = {Source identifier: 2369175}
}