@misc{indiciaef1b5922ab711,
  title = {Variability of routine pulmonary function tests.},
  author = {J Hruby and J Butler},
  year = {1975},
  doi = {10.1136/thx.30.5.548},
  url = {https://pubmed.ncbi.nlm.nih.gov/1198395/},
  note = {Source identifier: 1198395}
}