@misc{indiciaeb7769c6f5f83,
  title = {Methacholine inhalation challenge. Practical consequences of using duplicate spirograms after each concentration.},
  author = {L Prieto and J Marín},
  year = {1993},
  url = {https://pubmed.ncbi.nlm.nih.gov/8507045/},
  note = {Source identifier: 8507045}
}