Ecology, malnutrition, and mental development.
D000124:Achievement; D002648:Child; D002652:Child Behavior; D002657:Child Development; D004463:Ecology; D006801:Humans; D007360:Intelligence; D007361:Intelligence Tests; D009448:Neurochemistry; D009482:Neurophysiology; D011488:Protein Deficiency; D011603:Psychophysiology; D012959:Socioeconomic Factors