@misc{indiciaea06b6f002cb6,
  title = {Model-based screening by risk with application to Down's syndrome.},
  author = {P Royston and S G Thompson},
  year = {1992},
  doi = {10.1002/sim.4780110211},
  url = {https://pubmed.ncbi.nlm.nih.gov/1533726/},
  note = {Source identifier: 1533726}
}