title: The normal.
mesh_terms: D000222:Adaptation, Physiological; D000375:Aging; D003657:Decision Making; D004522:Educational Status; D004812:Epidemiologic Methods; D004992:Ethics, Medical; D030342:Genetic Diseases, Inborn; D014644:Genetic Variation; D006262:Health; D006706:Homeostasis; D006801:Humans; D008607:Intellectual Disability / Q000145:classification; D007360:Intelligence; D001523:Mental Disorders / Q000145:classification; D010641:Phenotype; D011110:Polymorphism, Genetic; D014481:United States