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What are sleep stages and why are they important?
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What happens in each sleep stage?
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What is the difference between an awakening and a disturbance?
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What is core sleep?
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What does circadian rhythm and window mean?
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What is a nap?
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What is a sleep episode?
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How much sleep do I need?
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Can the sleep information displayed in the app tell me if I have sleep apnea or any other sleep disorder?
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What is sleep onset latency?