TY - JOUR T1 - Prenatal Diagnosis and Screening JF - Journal of Medical Genetics JO - J Med Genet SP - 710 LP - 710 DO - 10.1136/jmg.30.8.710-a VL - 30 IS - 8 AU - Alan Emery Y1 - 1993/08/01 UR - http://jmg.bmj.com/content/30/8/710.2.abstract N2 - 300 Multiple ChoicesThis is a pdf-only article and there is no markup to show you.full-text.pdf ER -