@misc{indiciae846311b266f7,
  title = {Incentive spirometry versus routine chest physiotherapy.},
  author = {A Parker and S Verne},
  year = {1991},
  doi = {10.1016/0140-6736(91)93025-5},
  url = {https://pubmed.ncbi.nlm.nih.gov/1674326/},
  note = {Source identifier: 1674326}
}