TOPICS: Lactase deficiency, galactokinase deficiency, classic galactosemia, primary lactose intolerance, lactase, secondary lactose intolerance, autosomal recessive, galactose, galactitol, cataracts, galactose-1-phosphate uridyltransferase, galactose-1-phosphate, hypoglycemia, gluconeogenesis, glycogenolysis, sepsis, glucose, pyruvate, galactokinase, aldose reductase, 4-epimerase, phosphoglucomutase, glucose-6-phosphate, glucose-1-phosphate, galactose-1-phosphate, lactose, ADP, ATP