@misc{indiciae9ce8dbf27560,
  title = {Long-term performance of a hand held spirometer.},
  author = {A Dirksen and F Madsen and O F Pedersen and A M Vedel and A Kok-Jensen},
  year = {1996},
  doi = {10.1136/thx.51.10.973},
  url = {https://pubmed.ncbi.nlm.nih.gov/8977594/},
  note = {Source identifier: 8977594}
}