@misc{indiciae8198aa34a000,
  title = {Decision analysis and screening for Down's syndrome. Not using age specific values invalidates study.},
  author = {K Spencer},
  year = {1995},
  doi = {10.1136/bmj.311.7016.1371d},
  url = {https://pubmed.ncbi.nlm.nih.gov/7496308/},
  note = {Source identifier: 7496308}
}