PT - JOURNAL ARTICLE AU - James, William H TI - Recurrence rates for neural tube defects and vitamin supplementation AID - 10.1136/jmg.18.4.249 DP - 1981 Aug 01 TA - Journal of Medical Genetics PG - 249--251 VI - 18 IP - 4 4099 - http://jmg.bmj.com/content/18/4/249.short 4100 - http://jmg.bmj.com/content/18/4/249.full SO - J Med Genet1981 Aug 01; 18 AB - An attempt is made to assess the result of Smithells et al1 in the light of published data on recurrence rates for neural tube defects.