@misc{indiciae383b58f32970,
  title = {Extrapolation of methacholine PC(20).},
  author = {Beth E Davis and Donald W Cockcroft},
  year = {2002},
  doi = {10.1378/chest.122.4.1499},
  url = {https://pubmed.ncbi.nlm.nih.gov/12377897/},
  note = {Source identifier: 12377897}
}