@misc{indiciaec1e65d95c1ab,
  title = {Bronchoprovocation methods: direct challenges.},
  author = {Donald W Cockcroft},
  year = {2003},
  doi = {10.1385/criai:24:1:19},
  url = {https://pubmed.ncbi.nlm.nih.gov/12644716/},
  note = {Source identifier: 12644716}
}