LG LGVN150S - Manual (Page 108)

Safety
106
increased tumor development used
animals that had been genetically
engineered or treated with cancer-
causing chemicals so as to be
pre-disposed 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 do not 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 long-term
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
to provide reliable proof of a
cancer promoting effect if one
exists. Epidemiological studies
can provide data that is directly
applicable to human populations,
but ten or more years follow-up
may be needed to provide answers
about some health effects, such as
cancer. This is because the interval
between the time of exposure to
a cancer-causing agent and the
time tumors develop — if they do
— may be many, many years. The
interpretation of epidemiological
studies is hampered by difficulties
in measuring actual RF exposure
during day-to-day use of wireless
phones. Many factors affect this
measurement, such as the angle at
which the phone is held, or which
model of phone is used.