@misc{indiciae28d185a4f948,
  title = {The flutter device and expiratory pressures.},
  author = {Dina Brooks and Ellen Newbold and Louise F Kozar and Miguel Rivera},
  doi = {10.1097/00008483-200201000-00008},
  url = {https://pubmed.ncbi.nlm.nih.gov/11839998/},
  note = {Source identifier: 11839998}
}