@misc{indiciae4f8ad272608b, title = {Established markers in second trimester maternal serum.}, author = {H Cuckle}, year = {1996}, doi = {10.1016/s0378-3782(96)01814-2}, url = {https://pubmed.ncbi.nlm.nih.gov/9031835/}, note = {Source identifier: 9031835} }