@misc{indiciaed9801a7ab43d,
  title = {Evaluation of "electronic" spirometers.},
  author = {M X FitzGerald and A A Smith and E A Gaensler},
  year = {1973},
  doi = {10.1056/nejm197312132892406},
  url = {https://pubmed.ncbi.nlm.nih.gov/4749547/},
  note = {Source identifier: 4749547}
}