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The surest sign of problem gambling is when you've lost all your money and keep on losing it. But what if problem gambling could be detected before you'd emptied your wallet into a slot machine or left in on the card table? Some recent research suggests that it is possible to do that. And what will that mean for the gaming industry? Will it force casinos (and in the future, Web sites) to stop the gamblers before they lose their roll.

Dr. Sarah Nelson, Harvard Medical School

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