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Hartree (191324) writes "A World Health Organization group of experts doing a review of previous studies concluded that they could not rule out the the possibility that cell phones increase brain cancer risk. The judge the possibility to be great enough to warrant measures to reduce exposure. Hands free operation or testing were mentioned." Link to Original Source
The perversity of nature is nowhere better demonstrated by the fact that, when
exposed to the same atmosphere, bread becomes hard while crackers become soft.