@misc{indiciaed54ed66fbfea,
  title = {Diphtheria toxin.},
  author = {A M Pappenheimer},
  year = {1977},
  doi = {10.1146/annurev.bi.46.070177.000441},
  url = {https://pubmed.ncbi.nlm.nih.gov/20040/},
  note = {Source identifier: 20040}
}