Motorola Tarpon Basic User's Manual page 80

not increase with how often the mobile phone was used, or
the length of the calls. In fact, the risk actually decreased with
cumulative hours of mobile phone use. Most cancer causing
agents increase risk with increased exposure. An ongoing
study of brain cancers by the National Cancer Institute is
expected to bear on the accuracy and repeatability of these
1
results.
2. Researchers conducted a large battery of laboratory tests to
assess the effects of exposure to mobile phone RF on genetic
material. These included tests for several kinds of
abnormalities, including mutations, chromosomal
aberrations, DNA strand breaks, and structural changes in the
genetic material of blood cells called lymphocytes. None of
the tests showed any effect of the RF except for the
micronucleus assay, which detects structural effects on the
genetic material. The cells in this assay showed changes after
exposure to simulated cell phone radiation, but only after 24
hours of exposure. It is possible that exposing the test cells to
radiation for this long resulted in heating. Since this assay is
known to be sensitive to heating, heat alone could have
caused the abnormalities to occur. The data already in the
literature on the response of the micronucleus assay to RF are
conflicting. Thus, follow-up research is necessary.
FDA is currently working with government, industry, and
academic groups to ensure the proper follow-up to these industry-
funded research findings. Collaboration with the Cellular
Telecommunications Industry Association (CTIA) in particular is
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