January 12, 2009|Amber Dance L.A. Times
An aching back -- a dull twinge or a stabbing pain, lasting days or years -- is a source of annoyance, misery or even disability for millions of sufferers.

Eighty percent of the population will experience back pain at some point in their lives, and while the majority of cases resolve quickly, 30% recur, according to the North American Spine Society, an association of spinal health professionals based in Burr Ridge, Ill. 

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