Mental retardation as an extension of the developmental laboratory.
D000367:Age Factors; D006127:Group Structure; D006801:Humans; D007325:Institutional Practice; D008607:Intellectual Disability; D007360:Intelligence; D007361:Intelligence Tests; D008722:Methods; D010553:Personality Development; D011159:Population Surveillance; D012106:Research; D012494:Sampling Studies