Andy Caffrey
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ADHD 2.0: New Science and Essential Strategies, by Edward M. Hallowell

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How much sleep is enough? The amount of sleep it takes for you to wake up without an alarm clock. That’s your physiological requirement for sleep.
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ADHD 2.0: New Science and Essential Strategies
ADHD 2.0: New Science and Essential Strategies
by Edward M. Hallowell
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