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what waist measurement or over is thought to increase a person's risk of getting a heart attack?
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less than how many hours of sleep a night would run a person 2 to 3 times the risks of heart attacks?
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how many hours does a baby spend in a baby walker that will delay its first step by up to 4 days?
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for how long has a brush been in use that would reduce its plaque removing abilty up to 30 per cent than a new one?

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