@misc{indiciae7099e1efd2b6,
  title = {Tuberculin PPD RT23 is stable: quality control data cannot be denied.},
  author = {K Hasløv},
  year = {1998},
  url = {https://pubmed.ncbi.nlm.nih.gov/9848621/},
  note = {Source identifier: 9848621}
}