@misc{indiciae6aea153af95a,
  title = {Percutaneous balloon valve dilatation.},
  author = {S J Middleton},
  year = {1989},
  doi = {10.1136/bmj.298.6682.1251-a},
  url = {https://pubmed.ncbi.nlm.nih.gov/2502239/},
  note = {Source identifier: 2502239}
}