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Related articles:
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Delayed sleep phase syndrome
Non-24-hour sleep-wake syndrome
Melatonin
Key terms: sleep time day wake circadian disorders clock people hour work night normal causes light body time cues person get up cycle sleep phase syndrome enough evening earlier morning each day fall asleep sleep and wake circadian rhythm sleep disorders alertness irregular biological volunteers circadian clock sleep medicine Search external links cited by footnotes on Wikipedia page Circadian rhythm sleep disorder: |
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