title: Letter: Lactose intolerance in San populations.
mesh_terms: D000353:Africa, Southern; D000354:Africa, Western; D005075:Biological Evolution; D001902:Botswana; D005247:Feeding Behavior; D005787:Gene Frequency; D006801:Humans; D007787:Lactose Intolerance / Q000235:genetics*; D044469:Racial Groups