@misc{indiciae8958bca2b2ac,
  title = {Tuberculin sensitivity in elderly patients.},
  author = {M Holden},
  year = {1972},
  doi = {10.1164/arrd.1972.105.5.854b},
  url = {https://pubmed.ncbi.nlm.nih.gov/5020637/},
  note = {Source identifier: 5020637}
}