title: Prenatal diagnosis of trisomy 21 between 1991 and 1999 in the Leuven Centre for Human Genetics: effect of triple test screening.
authors.forename: I
authors.initials: I
authors.lastname: Witters
authors.forename: E
authors.initials: E
authors.lastname: Legius
authors.forename: G
authors.initials: G
authors.lastname: Matthijs
authors.forename: J P
authors.initials: JP
authors.lastname: Fryns
mesh_terms: D001530:Belgium; D004314:Down Syndrome / Q000175:diagnosis* / Q000235:genetics; D005260:Female; D005820:Genetic Testing; D005826:Genetics, Medical; D006801:Humans; D011247:Pregnancy; D011296:Prenatal Diagnosis