Medical personnel work outside the medical tent in the aftermath of two explosions near the finish line of the Boston Marathon on Monday. At area hospitals, doctors say they were confronted with the kinds of injuries U.S. troops get in Iraq and Afghanistan. Elise Amendola/AP hide caption

toggle caption Elise Amendola/AP

Boston Doctors Compare Marathon Bomb Injuries To War Wounds

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In 2009, more than 30 percent of ER visits for lower limb injuries came from sprains and strains, a study found. /iStockphoto.com hide caption

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