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- Scientists say they have nailed down the ideal amount of sleep in middle and old age CNN
- Forget 8 Hours – Scientists Discover Ideal Amount of Sleep in Middle and Old Age SciTechDaily
- The debate about how much sleep you really need may be over Duluth News Tribune
- University of Cambridge study shows 7 hours of sleep is ideal for middle-aged, older adults; cognitive performance, mental health WPVI-TV
- Exact amount of time you should sleep each night from certain age Liverpool Echo
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