@misc{indiciae896c8038b8d6,
  title = {Exercise testing and training in German CF centers.},
  author = {Michael Barker and Alexandra Hebestreit and Wolfgang Gruber and Helge Hebestreit},
  year = {2004},
  doi = {10.1002/ppul.10430},
  url = {https://pubmed.ncbi.nlm.nih.gov/15022132/},
  note = {Source identifier: 15022132}
}