[70-year-old farmer with increasing exertional dyspnea. Dyspnea in the barn].

@article{Stiefelhagen200270yearoldFW,
  title={[70-year-old farmer with increasing exertional dyspnea. Dyspnea in the barn].},
  author={Peter U Stiefelhagen},
  journal={MMW Fortschritte der Medizin},
  year={2002},
  volume={144 11},
  pages={51-2}
}