@misc{indiciae4666191f40ae,
  title = {Pursed lips breathing training using ear oximetry.},
  author = {B L Tiep and M Burns and D Kao and R Madison and J Herrera},
  year = {1986},
  doi = {10.1378/chest.90.2.218},
  url = {https://pubmed.ncbi.nlm.nih.gov/3731893/},
  note = {Source identifier: 3731893}
}