@misc{indiciae303aa5befed2,
  title = {[Comparison between age-dependent (Wald alpha program) and age-independent (Ulm index) analysis program for prenatal detection of Down's syndrome with serum markers].},
  author = {C Zwahr and P Voss and G Kistner},
  url = {https://pubmed.ncbi.nlm.nih.gov/9035827/},
  note = {Source identifier: 9035827}
}