CNNW Sanjay Gupta MD May 22, 2011
what surprised me is voices urging caution are not only getting louder, but they're getting more prominent. >> all right. i'm on my way. >> if you've ever put a cell phone to your ear, you should listen to what neurosurgeon dr. keith black has to say. >> there's no way to say that cell phone use is safe. i think the public has a right to know there could be a potential risk. the public generally assumes that if one is selling something on the market, that we have had assurances that that device is safe. >> to be clear, dr. black's message is at odds with headlines from the largest in...
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