@misc{indiciaeb5d4f160d08e,
  title = {Tuberculin sensitivity in elderly patients.},
  author = {C E Woodruff and P T Chapman},
  year = {1971},
  doi = {10.1164/arrd.1971.104.2.261},
  url = {https://pubmed.ncbi.nlm.nih.gov/5558995/},
  note = {Source identifier: 5558995}
}