@misc{indiciae137a570a96ec,
  title = {PEF versus FEV1.},
  author = {I Gregg},
  year = {2000},
  doi = {10.1136/thorax.55.9.807},
  url = {https://pubmed.ncbi.nlm.nih.gov/11012369/},
  note = {Source identifier: 11012369}
}