TY - JOUR T1 - Letters to the Editor JF - Journal of Medical Genetics JO - J Med Genet SP - 533 LP - 533 DO - 10.1136/jmg.27.8.533-a VL - 27 IS - 8 AU - Jane Hurst AU - Caroline Berry Y1 - 1990/08/01 UR - http://jmg.bmj.com/content/27/8/533.2.abstract N2 - 300 Multiple ChoicesThis is a pdf-only article and there is no markup to show you.full-text.pdf ER -