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Sprague Dawley rats were exposed to 435 MHz (CW or PW-1.0 usec pulse width, 1 kHz pulse rate) RF at an SAR of 0.3 W/kg for 22 hr daily, 7 days/wk, for 6 months. Exposure resulted in no significant changes in blood ACTH, corticosterone, prolactin, norepinephrine, epinephrine, and dopamine levels, hematocrit ratio, complete red and white blood cell counts, and a differential count of neutrophils, eosinophils, and monocytes, or cardiovascular endpoints (heart rate and mean arterial blood pressure). The authors conclude the chronic exposure was not a source of significant environmental stress. |