@misc{indiciae640ceb275bbc,
  title = {Longitudinal chest x-ray changes in normal men.},
  author = {R E Ensor and J L Fleg and Y C Kim and E F de Leon and S M Goldman},
  year = {1983},
  doi = {10.1093/geronj/38.3.307},
  url = {https://pubmed.ncbi.nlm.nih.gov/6841924/},
  note = {Source identifier: 6841924}
}