@misc{indiciae69d861c31a93,
  title = {Node negative breast cancer.},
  author = {S M O'Reilly and M A Richards},
  year = {1990},
  doi = {10.1136/bmj.300.6721.346},
  url = {https://pubmed.ncbi.nlm.nih.gov/2106982/},
  note = {Source identifier: 2106982}
}