01/23/2012 08:05 am ET Updated Mar 24, 2012

The High Cost Of A Good Night's Sleep

On a Monday night in December, Lauretta Martin, 47, visited the sleep lab at the National Rehabilitation Hospital in Washington, D.C. for the second time. On her first visit, Martin, a heavyset woman whose husband reports she is a loud snorer, was diagnosed with sleep apnea. This time, she was being fitted for a CPAP machine, which helps keep a snorer's airway open throughout the night.

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