@misc{indiciaefd471586b969,
  title = {Letter: Specificity of transfer factor.},
  author = {M R Salaman and H Valdimarsson},
  year = {1976},
  doi = {10.1038/259250b0},
  url = {https://pubmed.ncbi.nlm.nih.gov/55973/},
  note = {Source identifier: 55973}
}