ntds were seen in 7.8 % of the siblings of probands with high spina bifida but in only 0.7 % of the siblings of probands with low spina bifida , in 2.2 % of the siblings of anencephalic probands , and in none of the siblings of probands with craniorachischisis , encephalocele , or multiple ntds ( p less than .001 ) .
C0152426
craniorachischisis
C0027794
ntds