@misc{indiciae92716b25b457,
  title = {Incentive spirometer for bedside studies.},
  author = {D J Scheinhorn and W Warner and E Ellis},
  year = {1982},
  doi = {10.1097/00007611-198206000-00013},
  url = {https://pubmed.ncbi.nlm.nih.gov/7089620/},
  note = {Source identifier: 7089620}
}