@misc{indiciaeff7c8647f871,
  title = {Is IPPB therapy over-rated?},
  author = {J J Robbins},
  year = {1971},
  doi = {10.1378/chest.59.4.469},
  url = {https://pubmed.ncbi.nlm.nih.gov/4927991/},
  note = {Source identifier: 4927991}
}