A World Health Organization panel of 31 scientists raised some concerns Tuesday when they reported that cell phones are "possibly carcinogenic" and may be associated with "some risk" for brain cancer. But the group also called for further study. Jeffery Brown discusses concerns and precautions with neurosurgeon Keith Black.
VIDEO : Neurosurgeon: 'Your Cell Phone Is Not Necessarily a Safe Device' - PBS Newshour - 2011
Robin Des Toits
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