@misc{indiciae1198a60e7981,
  title = {Difficult asthma: beyond the guidelines.},
  author = {I Balfour-Lynn},
  year = {1999},
  doi = {10.1136/adc.80.2.201},
  url = {https://pubmed.ncbi.nlm.nih.gov/10325744/},
  note = {Source identifier: 10325744}
}