TY - JOUR T1 - Letters to the Editor JF - Journal of Medical Genetics JO - J Med Genet SP - 709 LP - 709 DO - 10.1136/jmg.30.8.709-a VL - 30 IS - 8 AU - L N AL-Jader AU - H C Ryley AU - S Maguire AU - G Owen AU - S Elborn AU - M C Goodchild Y1 - 1993/08/01 UR - http://jmg.bmj.com/content/30/8/709.2.abstract N2 - 300 Multiple ChoicesThis is a pdf-only article and there is no markup to show you.full-text.pdf ER -