Start school later, sleep longer, learn better: New study shows that flexible school start times can be an effective and practical approach to reducing chronic sleep deprivation and improving adolescents’ mental health and academic performance.

· · 来源：tutorial资讯

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Fergal Monsell, of the British Orthopaedic Association (BOA), which represents joint surgeons, said his organisation was working with NHS bosses to limit the impact on patients.