@misc{indiciaeef63b0ecfea8,
  title = {Smoking and immunity.},
  author = {P G Holt and W R Thomas and D Keast},
  year = {1973},
  doi = {10.1016/s0140-6736(73)91327-5},
  url = {https://pubmed.ncbi.nlm.nih.gov/4126100/},
  note = {Source identifier: 4126100}
}