I. backgroundSleep is very needed by the human body, so that the performance and the performance of the body remain optimal when the body is being awake. During sleep, the body will be formed and regenerate cells, supports brain function, and replenish the body's energy. For children and teens, sleep needed to assist flower process of growing them.Sleep is a biological function that in many respects remains mysterious. We know that sleep has a restorative function and most human beings need at least 7 or more hours to sleep at night in order to function properly.
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