@misc{indiciae2a57d7b3eb91,
  title = {Immunologic man: bird or beast?},
  author = {R K Gershen},
  year = {1969},
  doi = {10.1056/nejm196902272800921},
  url = {https://pubmed.ncbi.nlm.nih.gov/5763709/},
  note = {Source identifier: 5763709}
}