@misc{indiciae455daa03ebb1,
  title = {Two-step PPD testing for nursing home patients.},
  author = {E Lefton},
  year = {1989},
  doi = {10.1111/j.1532-5415.1989.tb01264.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/2738288/},
  note = {Source identifier: 2738288}
}