@misc{indiciae65ee87ddb3a7,
  title = {Balloon atrial septostomy.},
  author = {M J Tynan},
  year = {1968},
  doi = {10.1136/adc.43.232.744-a},
  url = {https://pubmed.ncbi.nlm.nih.gov/5702239/},
  note = {Source identifier: 5702239}
}