@misc{indiciaeb67457bb0fc9,
  title = {Toward the optimal protocol for Down syndrome screening.},
  author = {J N Macri and K Spencer},
  year = {1996},
  doi = {10.1016/s0002-9378(96)70638-5},
  url = {https://pubmed.ncbi.nlm.nih.gov/9065159/},
  note = {Source identifier: 9065159}
}