@misc{indiciae90742919b561,
  title = {Cancer research: a forward drift.},
  author = {T Crawford and N H Kemp},
  year = {1968},
  doi = {10.1016/s0140-6736(68)90554-0},
  url = {https://pubmed.ncbi.nlm.nih.gov/4173757/},
  note = {Source identifier: 4173757}
}