@misc{indiciae47618e7c3363,
  title = {[Simple spirometry and peak flow measurements].},
  author = {S Humerfelt and T B Aasen and A Gulsvik},
  year = {1990},
  url = {https://pubmed.ncbi.nlm.nih.gov/2237856/},
  note = {Source identifier: 2237856}
}