[Lung function examination (spirometry) is not so simple and requires training and time!].

@article{Madsen2012LungFE,
  title={[Lung function examination (spirometry) is not so simple and requires training and time!].},
  author={Flemming Madsen},
  journal={Ugeskrift for laeger},
  year={2012},
  volume={174 41},
  pages={2483}
}