Nokia 6330 User Manual page 141

gliomas were considered together. It should be noted that the average
length of mobile phone exposure in this study was less than three
years. When 20 types of glioma were considered separately, however,
an association was found between mobile phone use and one rare type
of glioma, neuroepithelliomatous tumors. It is possible with multiple
comparisons of the same sample that this association occurred by
chance. Moreover, the risk did 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 results.1
• 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.2
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 expected to lead to FDA
providing research recommendations and scientific oversight of new
CTIA-funded research based on such recommendations.
Two other studies of interest have been reported recently in the literature:
• Two groups of 18 people were exposed to simulated mobile phone
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