@misc{indiciaec855b9780406,
  title = {Intermittent severe mitral regurgitation.},
  author = {M A McDonnell and M J Preece and T J Tsagaris},
  year = {1978},
  doi = {10.1378/chest.74.2.130},
  url = {https://pubmed.ncbi.nlm.nih.gov/679739/},
  note = {Source identifier: 679739}
}