[Lactase deficiency].
D000818:Animals; D005696:Galactosidases / Q000378:metabolism; D006026:Glycoside Hydrolases / Q000378:metabolism; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D007785:Lactose / Q000378:metabolism; D007787:Lactose Intolerance / Q000175:diagnosis / Q000235:genetics / Q000628:therapy; D008297:Male; D008892:Milk
D005696:Galactosidases; D006026:Glycoside Hydrolases; D007785:Lactose