@misc{indiciaee12b41ecddb9,
  title = {Tuberculin conversions: true or false?},
  author = {W W Stead},
  year = {1979},
  doi = {10.1164/arrd.1979.119.1.171a},
  url = {https://pubmed.ncbi.nlm.nih.gov/420432/},
  note = {Source identifier: 420432}
}