1. Matcrnal serum markers in screening for Downi syndrome;Norgaard-Pedersen, B.; Larsen, S.O.; Arends, J.; Svenstrup, B.; Tabor, A.;Cltn Genet,1990
2. Maternal serum screening for Down's syndrome in early pregnancy;Wald, N.J.; Cuckle, H.S.; Densem, J.W.; Nanchahal, K.; Canick, J.A.; Haddow, J.E.,1988
3. An association betwcen low maternal serum (x fetoprotein and fetal chromosome abnormality;Merkatz, I.R.; Nitowsky, H.M.; Macri, J.N.; Johnson, W.E.;Am,1984
4. Abnormal maternal serum chorionic gonadotrophin levels in pregnancies with fetal chromosome abnormalities;Bogart, M.H.; Pandian, M.R.; Jones, O.W.;Prenat Diagn,1987
5. Low second trimester maternal serum unconjugated oestriol in pregnancy with Down's syndrome. Br7 Obstet Gynaecol;Canick, J.A.; Knight, G.J.; Palomaki, G.E.; Haddow, J.E.; Cuckle, H.S.; Wald, N.J.,1988