@misc{indiciae217e9281f7b3,
  title = {Midtrimester amniocentesis. Influence of operator caseload on sampling efficiency.},
  author = {R K Silver and T L Russell and M P Kambich and E A Leeth and S N MacGregor and J S Sholl},
  year = {1998},
  url = {https://pubmed.ncbi.nlm.nih.gov/9564643/},
  note = {Source identifier: 9564643}
}