Authors: Ryall, RG Callen, D Cocciolone, R Duvnjak, A Esca, R Frantzis, N Gjerde, EM Haan, EA Hocking, T Sutherland, G Thomas, DW Webb, F

Citation: Rg. Ryall et al., Karyotypes found in the population declared at increased risk of Down syndrome following maternal serum screening, PRENAT DIAG, 21(7), 2001, pp. 553-557

Authors: Cheffins, T Chan, A Haan, EA Ranieri, E Ryall, RG Keane, RJ Byron-Scott, R Scott, H Gjerde, EM Nguyen, AM Ford, JH Sykes, S

Citation: T. Cheffins et al., The impact of maternal serum screening on the birth prevalence of Down's syndrome and the use of amniocentesis and chorionic villus sampling in SouthAustralia, BR J OBST G, 107(12), 2000, pp. 1453-1459