@misc{indiciaeb96bd321cf6e,
  title = {[Long-term oxygen therapy versus multiple-step oxygen therapy].},
  author = {W Petro},
  year = {1985},
  doi = {10.1055/s-2008-1068903},
  url = {https://pubmed.ncbi.nlm.nih.gov/3996220/},
  note = {Source identifier: 3996220}
}