Spina bifida trials.
D006805:Human Experimentation; D006801:Humans; D007258:Informed Consent; D009747:Nutritional Physiological Phenomena; D011897:Random Allocation; D012107:Research Design; D016135:Spinal Dysraphism; D006113:United Kingdom; D014815:Vitamins
Biomedical and Behavioral Research; Medical Research Council