A study carried out by Karolinska Institute (Sweden) and Wayne State University (USA) reveals exposure to radiofrequency (RF) energy has raised concerns over the effects of radiations from mobile devices on sleeping habits. The participants were exposed to sham exposure (sham) or 884MHz GSM wireless communication signals equivalent to those received when using a mobile phone.

More interestingly the study was sponsored by the Mobile Manufacturers Forum, an industry group representing makers of cell phones

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