@misc{indiciaeef18730127d9,
  title = {Tumor cell societies.},
  author = {G H Heppner},
  year = {1989},
  doi = {10.1093/jnci/81.9.648},
  url = {https://pubmed.ncbi.nlm.nih.gov/2709420/},
  note = {Source identifier: 2709420}
}