According to Ronald Herberman, M.D., former head of UPCI,
it takes decades for the brain to lay down the electrical insulation(known as myelin) that presumably shields the nerves, for the most part, from radio waves.
In September, Dr. Herberman appeared before a sparsely attended subcommittee meeting--
it was the week the banking crisis came to a head-- to argue that while more research was needed, enough data was available for him to warn his staff to begin using earbuds and speakerphones and to keep their cellphones away from their children.