@misc{indiciae828820235d55,
  title = {What is this thing called CFA?},
  author = {A U Wells and D M Hansell and A G Nicholson},
  year = {2007},
  doi = {10.1136/thx.2005.051011},
  url = {https://pubmed.ncbi.nlm.nih.gov/17189529/},
  note = {Source identifier: 17189529}
}