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LG GR501
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User Guide128
cannot be repeated in other
laboratories. A few animal
studies, however, have
suggested that low levels
of RF could accelerate the
development of cancer in
laboratory animals. However,
many of the studies that showed
increased tumor development
used animals that had been
genetically engineered or treated
with cancer causing chemicals so
as to be predisposed to develop
cancer in the absence of RF
exposure. Other studies exposed
the animals to RF for up to 22
hours per day. These conditions
are not similar to the conditions
under which people use wireless
phones, so we don’t know with
certainty what the results of such
studies mean for human health.
Three large epidemiology studies
have been published since
December 2000. Between them,
the studies investigated any
possible association between
the use of wireless phones and
primary brain cancer, glioma,
meningioma, or acoustic
neuroma, tumors of the brain or
salivary gland, leukemia, or other
cancers. None of the studies
demonstrated the existence of
any harmful health effects from
wireless phone RF exposures.
However, none of the studies
can answer questions about
longterm exposures, since the
average period of phone use in
these studies was around three
years.
5. What research is needed to
decide whether RF exposure
from wireless phones poses a
health risk?
A combination of laboratory
studies and epidemiological
studies of people actually
using wireless phones would
provide some of the data that
are needed. Lifetime animal
exposure studies could be
completed in a few years.
However, very large numbers
of animals would be needed
Safety Guidelines