The National Toxicology Program conducted the study using male rats. After exposing more than 2,500 rats to radio frequency energy in intervals totaling nine hours a day for two years, they found “low incidences” of tumors in brain cells and heart cells, reports The Wall Street Journal.
“Given the widespread global usage of mobile communications among users of all ages, even a very small increase in the incidence of disease resulting from exposure to [radio-frequency radiation] could have broad implications for public health,” according to a report of partial findings cited by WSJ.
The study did not find the same occurrence in female rats, and while the study was also conducted on mice, those findings were not released, according to the report.
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