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Authors: N J Wald; H S Cuckle; J W Densem; K Nanchahal; P Royston; T Chard; J E Haddow; G J Knight; G E Palomaki; J A Canick
Journal: BMJ Date: 1988-10-08

5. Integrated screening for Down's syndrome based on tests performed during the first and second trimesters.

Authors: N J Wald; H C Watt; A K Hackshaw
Journal: N Engl J Med Date: 1999-08-12 Impact factor: 91.245

6. Appropriate biochemical parameters in first-trimester screening for Down syndrome.

Authors: H S Cuckle; J M van Lith
Journal: Prenat Diagn Date: 1999-06 Impact factor: 3.050

7. MULTISCAN--a Scandinavian multicenter second trimester obstetric ultrasound and serum screening study.

Authors: F S Jørgensen; L Valentin; K A Salvesen; C Jørgensen; F R Jensen; J Bang; S H Eik-Nes; M Madsen; K Marsal; P H Persson; J Philip; J W Bogstad; B Nørgaard-Pedersen
Journal: Acta Obstet Gynecol Scand Date: 1999-07 Impact factor: 3.636

8. UK multicentre project on assessment of risk of trisomy 21 by maternal age and fetal nuchal-translucency thickness at 10-14 weeks of gestation. Fetal Medicine Foundation First Trimester Screening Group.

Authors: R J Snijders; P Noble; N Sebire; A Souka; K H Nicolaides
Journal: Lancet Date: 1998-08-01 Impact factor: 79.321

9. Second-trimester maternal serum screening using alpha-fetoprotein, human chorionic gonadotrophin, and unconjugated oestriol: experience of a regional programme.

Authors: S F Goodburn; J R Yates; P R Raggatt; C Carr; M E Ferguson-Smith; A J Kershaw; P J Milton; M A Ferguson-Smith
Journal: Prenat Diagn Date: 1994-05 Impact factor: 3.050

10. Four-marker serum screening for Down's syndrome.

Authors: N J Wald; J W Densem; D Smith; G G Klee
Journal: Prenat Diagn Date: 1994-08 Impact factor: 3.050