Lactase deficiency.
D002239:Carbohydrate Metabolism, Inborn Errors / Q000150:complications* / Q000175:diagnosis*; D003109:Colonic Diseases, Functional / Q000209:etiology*; D006026:Glycoside Hydrolases / Q000378:metabolism; D006801:Humans; D007785:Lactose / Q000378:metabolism*; D007787:Lactose Intolerance / Q000150:complications / Q000175:diagnosis; D008659:Metabolic Diseases
D006026:Glycoside Hydrolases; D007785:Lactose