Tillmann T, Ernst H, Ebert S, Kuster N, et al. (2007):

The aim of this study was to assess potential carcinogenic effects on mice of exposure to RFR from GSM (902MHz) and DCS (1747 MHz) handsets. Restrained mice, after a period of acclimatization, were exposed for 2 h per day, 5 days per week, over a period of 2 years. Three different whole-body averaged SAR levels were used - 0.4, 1.2, and 4.0 mW/g bw. Groups of mice were also sham-exposed.

There were no differences between the sham and exposed groups in food intake, body weight gain, mortality, hematological analysis, or organ weights.

There were no differences in the incidence of any particular tumour type in the RF exposed groups as compared to the sham exposed groups. While the incidences of hepatocellular carcinoma were similar in RFR and sham exposed groups, the incidence of liver adenomas decreased with increasing dose levels. The incidences in the high dose groups were statistically significantly different from those in the sham exposed groups. The observed tumour rates were within the range of historical control data.

The authors state:
                "In conclusion, the present study produced no evidence that the exposure of male and female B6C3F1 mice to wireless GSM and DCS radio frequency signals at a whole body absorption rate of up to 4.0 W/kg resulted in any adverse health effect or had any cumulative influence on the incidence or severity of neoplastic and non-neoplastic background lesions, and thus the study did not provide any evidence of RF possessing a carcinogenic potential".

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