@misc{indiciae06e5e441cf10,
  title = {Adjunct therapy in chronic obstructive pulmonary disease.},
  author = {N M Lefcoe and N A Paterson},
  year = {1973},
  doi = {10.1016/0002-9343(73)90029-6},
  url = {https://pubmed.ncbi.nlm.nih.gov/4569964/},
  note = {Source identifier: 4569964}
}