Long time: Old timers worked the fields and mines for 18-20 hours a day! But now most recommend 8 hours sleep. If it is YOUR business, AS MUCH as it takes to make a living!!
Answered 6/6/2014
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A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
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