@misc{indiciaed477add2308f,
  title = {Screening for Down syndrome.},
  author = {R P Ager and R W Oliver},
  year = {1987},
  doi = {10.1016/s0140-6736(87)92949-7},
  url = {https://pubmed.ncbi.nlm.nih.gov/2442573/},
  note = {Source identifier: 2442573}
}