Big bucks from bad backs
The tens of millions of Americans who suffer sporadic or chronic backaches spent some $5 billion last year for treatments, ranging from surgery to bone-rattling manipulations. Many people will try almost anything to get relief. They will hang upside down, or turn to acupuncture and electric stimulation. Some sufferers have invested in sandals covered with tiny bumps designed to massage the nerves in their feet as a way of easing back pain.
Such desperation has spurred the ingenuity of tinkerers and entrepreneurs, who are bringing out an astonishing array...
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