Dhaifalah, Ishraq A: Screening for chromosomal abnormalities in the first trimester using ultrasound and maternal serum biochemistry in a one-stop clinic: a one-year review prospective experience for the first time in the Czech Republic : Postupy lege artis II. Sborník celostátní konference ČGPS ČLS JEP a SSG ČR, Hradec Králové, 27.5.-29.5.2005. Abstrakt