Interesting, do you have a source ? (Aka citation needed).
I'm genuinely interested in getting such kind of study result. Of course the real subject is long term exposure effects of radio microwaves. For which I'm not sure many results (scientific ones) exist. And incidentally I'm going to install Ethernet plugs in our sons school next week to avoid this - not for me but by other parents demand (which I think will bring more reliable connectivity - win win )