TY - JOUR AN - 3 AU - Bindra,R. AU - Heath,V. AU - Liao,A. TI - One-stop clinic for assessment of risk for trisomy 21 at 11 - 14 weeks: a prospective study of 15 030 pregnancies. JO - Ultrasound Obstet Gynecol PY - 2002 VL - 20 SP - 219-225 M2 - 219 DO - 10.1046/j.1469-0705.2002.00808.x ER -