@misc{indiciae301f7681d98a,
  title = {A diagnostic approach to 'difficult' asthma.},
  author = {M J Rumbak and T H Self},
  year = {1992},
  doi = {10.1080/00325481.1992.11701441},
  url = {https://pubmed.ncbi.nlm.nih.gov/1518763/},
  note = {Source identifier: 1518763}
}