@misc{indiciae832e593d32c5,
  title = {Prenatal screening for Down's syndrome.},
  author = {M J Stone and S F Levy and W Tait and P J Allan and P J Riley},
  year = {1991},
  doi = {10.1136/bmj.303.6795.188},
  url = {https://pubmed.ncbi.nlm.nih.gov/1715224/},
  note = {Source identifier: 1715224}
}