@misc{indiciaec38cd2c9d49b,
  title = {Asthma exacerbations. 2: aetiology.},
  author = {A M Singh and W W Busse},
  year = {2006},
  doi = {10.1136/thx.2005.045179},
  url = {https://pubmed.ncbi.nlm.nih.gov/16936237/},
  note = {Source identifier: 16936237}
}