Trẻ ngủ sớm sẽ giảm nguy cơ suy nhược
Cập nhật: 08:34 11/06/2009 GMT+7
Một nghiên cứu tại Trung tâm Y khoa của trường Đại học Columbia, New York, Mỹ mới đây chỉ ra rằng, trẻ ngủ sớm có nguy cơ suy nhược thấp hơn trẻ thường xuyên thức khuya.
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