@misc{indiciae5335114fcfd0,
  title = {Maturation in human tumours.},
  author = {D W Smithers},
  year = {1969},
  doi = {10.1016/s0140-6736(69)90603-5},
  url = {https://pubmed.ncbi.nlm.nih.gov/4186609/},
  note = {Source identifier: 4186609}
}