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Prenatal Diagnosis|December 1, 1995
Repeat maternal serum testing for Down's syndrome screening using multiple markers with special reference to free alpha and free beta-hCGA K Hackshaw, J Densem, N J WaldPrenatal Diagnosis|November 1, 1993
Serum alpha-fetoprotein and neural tube defects in the first trimester of pregnancy. MRC Vitamin Study Research GroupN J Wald, A Hackshaw, R Stone, et al.British Journal of Obstetrics and Gynaecology|January 1, 1989
Repeat maternal serum alpha-fetoprotein testing in antenatal screening programmes for Down's syndromeH S Cuckle, N J Wald, K Nanchahal, et al.Prenatal Diagnosis|August 1, 1996
Effect of allowing for ethnic group in prenatal screening for Down's syndromeH C Watt, N J Wald, D Smith, et al.Thorax|October 1, 1995
The tar reduction study: randomised trial of the effect of cigarette tar yield reduction on compensatory smokingC Frost, F M Fullerton, A M Stephen, et al.Lancet (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 19