TY - JOUR T1 - Letters to the Editor JF - Journal of Medical Genetics JO - J Med Genet SP - 277 LP - 278 DO - 10.1136/jmg.27.4.277-a VL - 27 IS - 4 AU - M A Lamont AU - A J Salisbury Y1 - 1990/04/01 UR - http://jmg.bmj.com/content/27/4/277.2.abstract N2 - 300 Multiple ChoicesThis is a pdf-only article and there is no markup to show you.full-text.pdf ER -