@misc{indiciaec5476da57b6a,
  title = {Blowing soap bubbles: teaching pursed-lip breathing.},
  author = {L M Custodio},
  year = {1998},
  doi = {10.1378/chest.114.4.1224},
  url = {https://pubmed.ncbi.nlm.nih.gov/9792603/},
  note = {Source identifier: 9792603}
}