@misc{indiciae4a211c4dcc4a, title = {[Second trimester Down syndrome serum screening--results from a pilot study].}, author = {V Dimitrova and T Chernev and I Kremenski and V Mazneĭkova and E Mikhaĭlova and E Simeonov and R Tincheva and D Toncheva}, year = {2002}, url = {https://pubmed.ncbi.nlm.nih.gov/12066548/}, note = {Source identifier: 12066548} }