photo - Cancer survivor Lawrence Gentner, 68, of Snellville, Ga., talks with his exercise group after a class, in Atlanta. A cancer diagnosis often inspires people to exercise and eat healthier. Now the experts say there's evidence that that may help the disease from returning. The American Cancer Society on Thursday issued new guidelines urging doctors to talk to their cancer patients about slimming down if they're fat, eating right and doing some exercise. (AP Photo/David Goldman)
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