interesting article
http://online.wsj.com/article/SB1000...hatsNewsSecond

" By JOHN CARREYROU And TOM MCGINTY

Norton Hospital in Louisville, Ky., may not be a household name nationally. But five senior spine surgeons have helped put it on the map in at least one category: From 2004 to 2008, Norton performed the third-most spinal fusions on Medicare patients in the country.
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Conservative spine surgeons argue that a spinal fusion is appropriate only for a small number of conditions, such as spinal instability, spinal fracture or a severe curvature of the spine known as scoliosis, and that financial incentives have caused the procedure to become overused. Others say it's a useful tool to treat patients who have debilitating back pain and have tried other options like physical therapy to no avail.

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