Ethics of experimentation.
D002664:Child Nutritional Physiological Phenomena; D002675:Child, Preschool; D004992:Ethics, Medical; D005494:Folic Acid Deficiency / Q000150:complications / Q000401:mortality; D006805:Human Experimentation; D006801:Humans; D007223:Infant; D007227:Infant Nutritional Physiological Phenomena; D008286:Malabsorption Syndromes / Q000209:etiology