@misc{indiciae4aa5916656f7,
  title = {Ampicillin and urticaria.},
  author = {E T Knudsen},
  year = {1969},
  doi = {10.1136/bmj.1.5647.846-b},
  url = {https://pubmed.ncbi.nlm.nih.gov/4237639/},
  note = {Source identifier: 4237639}
}