@misc{indiciaec9406259f9c4,
  title = {Acquired tracheomalacia.},
  author = {T H Johnson and J J Mikita and R J Wilson and J H Feist},
  year = {1973},
  doi = {10.1148/109.3.576},
  url = {https://pubmed.ncbi.nlm.nih.gov/4772168/},
  note = {Source identifier: 4772168}
}