@misc{indiciaeb56627e4fa8c,
  title = {Them and us.},
  author = {J E Simpson},
  year = {1978},
  doi = {10.1016/s0140-6736(78)91760-9},
  url = {https://pubmed.ncbi.nlm.nih.gov/79044/},
  note = {Source identifier: 79044}
}