@misc{indiciae51d455ab8767,
  title = {Letter: Step decline in lung function.},
  author = {G Berry},
  year = {1974},
  doi = {10.1164/arrd.1974.110.2.203},
  url = {https://pubmed.ncbi.nlm.nih.gov/4414407/},
  note = {Source identifier: 4414407}
}