@misc{indiciae8736368d216f,
  title = {Full-dose tuberculin standard.},
  author = {M B Zack and L L Fulkerson and P Q Edwards},
  year = {1972},
  doi = {10.1056/nejm197205042861820},
  url = {https://pubmed.ncbi.nlm.nih.gov/5015436/},
  note = {Source identifier: 5015436}
}