Motorola A388 User Manual page 130

apply to the use of mobile phones. First, it is uncertain how to
apply the results obtained in rats and mice to humans. Second,
many of the studies that showed increased tumor development
used animals that had already been treated with cancer-causing
chemicals, and other studies exposed the animals to the RF
virtually continuously--up to 22 hours per day.
For the past five years in the United States, the mobile phone
industry has supported research into the safety of mobile
phones. This research has resulted in two findings in particular
that merit additional study:
In a hospital-based, case-control study, researchers looked for an
association between mobile phone use and either glioma (a type
of brain cancer) or acoustic neuroma (a benign tumor of the
nerve sheath). No statistically significant association was found
between mobile phone use and acoustic neuroma. There was
also no association between mobile phone use and gliomas
when all types of types of 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)
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