@misc{indiciae74b0836281f5,
  title = {Thoracic calcifications.},
  author = {B Felson},
  year = {1969},
  doi = {10.1378/chest.56.4.330},
  url = {https://pubmed.ncbi.nlm.nih.gov/4980598/},
  note = {Source identifier: 4980598}
}