@misc{indiciaed22dd8aaab10,
  title = {Immunology. Tolerance: a second mechanism.},
  author = {A L DeFranco},
  year = {1989},
  doi = {10.1038/342340a0},
  url = {https://pubmed.ncbi.nlm.nih.gov/2586604/},
  note = {Source identifier: 2586604}
}