Getting less than six hours sleep a night increases risk of early death, The Independent

Not sleeping releases hormones that increase stress levels, speed up the heart rate and raise blood pressure

Sleeping less than 6 hours a night in midlife raises risk of dementia 30%, study finds

Less than 6 hours of sleep could be deadly for some - The Statesman

Poor sleep linked to dementia and early death, study finds

Sleeping less than six hours a night skews activity of hundreds of genes, Medical research

Not sleeping sufficiently? Less than 6 hours of sleep can double death risk

Sleep Deprivation: Symptoms, Treatment, & Effects

Sleeping for less than six hours may cause early death, study finds, Health

The mortality risk of night-time and daytime insomnia symptoms in an older population

Poor sleep linked to dementia and early death, study finds

Sleeping between 7 and 9 hours a night can slash risk of early death

Why Sleep Matters: Quantifying the Economic Costs of Insufficient Sleep

Lack of Sleep May Lead to Early Death, Study Finds