@misc{indiciae6b8137e4223c,
  title = {Percutaneous balloon valve dilatation.},
  author = {M J Levine and R G McKay},
  year = {1989},
  doi = {10.1136/bmj.298.6674.620},
  url = {https://pubmed.ncbi.nlm.nih.gov/2496782/},
  note = {Source identifier: 2496782}
}