@misc{indiciaeca56cdb33498,
  title = {The PDN prosthetic disc-nucleus device.},
  author = {Charles D Ray},
  year = {2002},
  doi = {10.1007/s00586-002-0425-7},
  url = {https://pubmed.ncbi.nlm.nih.gov/12384735/},
  note = {Source identifier: 12384735}
}