@misc{indiciaef3b47eeea818,
  title = {The tuberculin unit.},
  author = {D T Smith},
  year = {1969},
  doi = {10.1164/arrd.1969.99.5.820},
  url = {https://pubmed.ncbi.nlm.nih.gov/5772063/},
  note = {Source identifier: 5772063}
}