PT - JOURNAL ARTICLE ED - , TI - Correction AID - 10.1136/jmg.18.2.159 DP - 1981 Apr 01 TA - Journal of Medical Genetics PG - 159--159 VI - 18 IP - 2 4099 - http://jmg.bmj.com/content/18/2/159.short 4100 - http://jmg.bmj.com/content/18/2/159.full SO - J Med Genet1981 Apr 01; 18