@misc{indiciae90f6752560eb,
  title = {A permanent sputum-induction cubicle.},
  author = {M G Betten and M D Newberry},
  year = {1968},
  doi = {10.1164/arrd.1968.98.4.711},
  url = {https://pubmed.ncbi.nlm.nih.gov/5677158/},
  note = {Source identifier: 5677158}
}