TY - GEN AU - Hackshaw,A K AU - Wald,N J TI - Revised distribution parameters for serum markers for trisomy 18 SN - 0969-1413 PY - 2001///0405 KW - Biomarkers KW - blood KW - Chorionic Gonadotropin KW - Chorionic Gonadotropin, beta Subunit, Human KW - Chromosomes, Human, Pair 18 KW - Estriol KW - Female KW - Humans KW - Pregnancy KW - Prenatal Diagnosis KW - methods KW - Trisomy KW - diagnosis KW - alpha-Fetoproteins KW - analysis N1 - Publication Type: Letter UR - https://doi.org/10.1136/jms.7.4.215 ER -