Congenital lactase deficiency.
D002239:Carbohydrate Metabolism, Inborn Errors; D004032:Diet; D005696:Galactosidases; D005951:Glucose Tolerance Test; D006801:Humans; D007223:Infant; D007422:Intestines / Q000201:enzymology; D007785:Lactose; D007787:Lactose Intolerance; D008297:Male
D005696:Galactosidases; D007785:Lactose