@misc{indiciaebd4fe5809ff8,
  title = {[COPD: stage-appropriate therapy].},
  author = {H Wilkens and G W Sybrecht},
  year = {2001},
  doi = {10.1007/s001080170017},
  url = {https://pubmed.ncbi.nlm.nih.gov/11793604/},
  note = {Source identifier: 11793604}
}