@misc{indiciae213a923237ff,
  title = {Difficult asthma: defining the problems.},
  author = {S C Ranganathan and D N Payne and A Jaffe and S A McKenzie},
  year = {2001},
  doi = {10.1002/1099-0496(200102)31:2<114::aid-ppul1018>3.0.co;2-o},
  url = {https://pubmed.ncbi.nlm.nih.gov/11180686/},
  note = {Source identifier: 11180686}
}