@misc{indiciae62409a2bd1d9,
  title = {Difficult asthma.},
  author = {B D W Harrison},
  year = {2003},
  doi = {10.1136/thorax.58.7.555},
  url = {https://pubmed.ncbi.nlm.nih.gov/12832662/},
  note = {Source identifier: 12832662}
}