@misc{indiciaeb49e048e92db,
  title = {Perfusion defects in the aging lung.},
  author = {S A Friedman and H M Schub and E H Smith and N A Solomon},
  year = {1970},
  doi = {10.1016/0002-8703(70)90304-2},
  url = {https://pubmed.ncbi.nlm.nih.gov/5410947/},
  note = {Source identifier: 5410947}
}