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British Journal of Obstetrics and Gynaecology|December 28, 1999
Serum markers for Down's syndrome in women who have had in vitro fertilisation: implications for antenatal screeningN J Wald, N White, J K Morris, et al.Obstetrics and Gynecology|May 1, 1993
Cigarette smoking and levels of maternal serum alpha-fetoprotein, unconjugated estriol, and hCG: impact on Down syndrome screeningG E Palomaki, G J Knight, J E Haddow, et al.British Journal of Obstetrics and Gynaecology|April 1, 1988
Low second trimester maternal serum unconjugated oestriol in pregnancies with Down's syndromeJ A Canick, G J Knight, G E Palomaki, et al.British Journal of Obstetrics and Gynaecology|April 1, 1988
Maternal serum unconjugated oestriol as an antenatal screening test for Down's syndromeN J Wald, H S Cuckle, J W Densem, et al.Seminars in Perinatology|November 7, 1999
First trimester screening for aneuploidy: serum biochemical markersJ A Canick, L H KellnerLancet (London, England)|January 17, 1976
Mortality from lung cancer and coronary heart-disease in relation to changes in smoking habitsN J WaldCiba Foundation Symposium|January 1, 1994
Folic acid and neural tube defects: the current evidence and implications for preventionN J WaldBibliotheca Nutritio Et Dieta|January 1, 1995
Folic acid and the prevention of neural tube defects: the need for public health actionN J WaldProgress in Clinical and Biological Research|January 1, 1995
Antenatal screening for Down syndromeN J WaldPageof 26