@misc{indiciae2c9074733e42,
  title = {Balloon trial.},
  author = {T Appenzeller},
  year = {1989},
  doi = {10.1038/scientificamerican0589-32},
  url = {https://pubmed.ncbi.nlm.nih.gov/2524097/},
  note = {Source identifier: 2524097}
}