@misc{indiciae2d137ec0eba9,
  title = {Tuberculin reactions.},
  author = {M Holden},
  year = {1973},
  doi = {10.1056/nejm197301252880421},
  url = {https://pubmed.ncbi.nlm.nih.gov/4682240/},
  note = {Source identifier: 4682240}
}