@misc{indiciaeffa5177ee4b9,
  title = {Letter: Immunotherapy.},
  author = {F Perlman},
  year = {1974},
  doi = {10.1016/0091-6749(74)90041-4},
  url = {https://pubmed.ncbi.nlm.nih.gov/4852820/},
  note = {Source identifier: 4852820}
}