title: The geographical incidence of lactase deficiency.
mesh_terms: D000222:Adaptation, Physiological; D000328:Adult; D000818:Animals; D004032:Diet; D005006:Ethnicity; D005959:Glucosidases / Q000378:metabolism; D006801:Humans; D007410:Intestinal Diseases / Q000150:complications; D007413:Intestinal Mucosa / Q000201:enzymology; D007785:Lactose / Q000378:metabolism; D007787:Lactose Intolerance / Q000201:enzymology / Q000453:epidemiology* / Q000235:genetics; D008892:Milk
chemical_list: D005959:Glucosidases; D007785:Lactose