@misc{indiciae8b44a1baf5d0,
  title = {Patch testing in penicillin allergy.},
  author = {W G van Ketel},
  year = {1975},
  doi = {10.1111/j.1600-0536.1975.tb05407.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/139236/},
  note = {Source identifier: 139236}
}