Authors: Bersinger, NA Leporrier, N Herrou, M Leymarie, P

Citation: Na. Bersinger et al., Maternal serum pregnancy-associated plasma protein A (PAPP-A) but not pregnancy-specific beta 1-glycoprotein (SP1) is a useful second-trimester marker for fetal trisomy 18, PRENAT DIAG, 19(6), 1999, pp. 537-541