There is evidence of cellular damage with exposure to this radiation. Also, just going to put this here- worked in a building with a large call center, and man, the headset people had more health issues than any group I've known, which at the time I put to unhealthy eating habits. Second, personally know a brain tumor survivor, and it took years for that diagnosis because they literally looked everyplace else and were going to go with Alzheimer's and meds. But for youth and stubbornness, that was going to be it, until finally a brain scan was ordered, 'just in case'- and hey, what do you know, a freaking golf ball-sized thing...