1. The extent of Dosn's syndrome screening in Britain in 1991;Wald, N.; Wald, K.; Smith, D.;Iaitcet,1992
2. Fetal nuchal translucency: ultrasound screening for chromosomal defects in first trimester of pregnancy;BAIJ,1992
3. Non-echogenic nuchal oedema as a marker in trisomy 21 screening;Schulte-Vallentin, M.; Schindler, H.;Lawtcct,1992
4. Nonechogenic nuchal oedema as a marker in trisomy 21 screening;NLM, Van Zalen-Sprock; san N\ugt JMG; van Geion HP;L.awtcet,1992
5. Antenatal screening for Doswn's syndrome;Cuckle, H.; Lilford, R.,1992