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Recurrence rates for neural tube defects and vitamin supplementation
  1. William H James
  1. 1Department of Genetics and Biometry, The Galton Laboratory, University College London, 4 Stephenson Way, London NW1 2HE.


    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.

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