title: Genes under pressure.
authors.forename: Laura M
authors.initials: LM
authors.lastname: Zahn
authors.forename: Beverly A
authors.initials: BA
authors.lastname: Purnell
mesh_terms: D000818:Animals; D004032:Diet; D004781:Environmental Exposure; D059647:Gene-Environment Interaction; D005796:Genes; D014644:Genetic Variation; D006801:Humans; D007107:Immune System; D008019:Life Style; D012641:Selection, Genetic