TY - JOUR T1 - The frequency of mental retardation in hypochondroplasia. JF - Journal of Medical Genetics JO - J Med Genet SP - 644 LP - 644 DO - 10.1136/jmg.28.9.644 VL - 28 IS - 9 AU - R Wynne-Davies AU - M A Patton Y1 - 1991/09/01 UR - http://jmg.bmj.com/content/28/9/644.1.abstract N2 - 300 Multiple ChoicesThis is a pdf-only article and there is no markup to show you.full-text.pdf ER -