title: Intestinal lactase deficiency in adult nonhuman primates: implications for selection pressures in man.
mesh_terms: D000818:Animals; D003431:Cross-Cultural Comparison; D005828:Genetics, Population; D000882:Haplorhini; D006801:Humans; D007787:Lactose Intolerance; D008251:Macaca; D011323:Primates; D012641:Selection, Genetic