@misc{indiciae18a3164c9c9c,
  title = {Long-term oxygen and advanced chronic bronchitis.},
  author = {C Cordova and A Musca and F Violi and A Perrone and C Alessandri},
  year = {1981},
  doi = {10.1016/s0140-6736(81)92259-5},
  url = {https://pubmed.ncbi.nlm.nih.gov/6112460/},
  note = {Source identifier: 6112460}
}