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In his new book, " It Doesn't Have to Hurt: Your Smart Guide to a Pain-Free Life" (published September 2 by Simon & Schuster), Dr. Sanjay Gupta, a neurosurgeon and chief medical correspondent for CNN, writes about chronic pain, and the innovative techniques now being used to study and treat it.

Read an excerpt below, and don't miss Jane Pauley's interview with Dr. Gupta on "CBS Sunday Morning" August 31!

"It Doesn't Have to Hurt: Your Smart Guide to a Pain-Free Life" by Dr. Sanjay Gupta $21 at Amazon

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Over a hundred years ago, William Osler, the Canadian physician and founding influence on mode

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