LG Optimus G Pro E980 Owner's Manual page 120

Safety Guidelines
phones have yielded conflicting results
that often 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 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 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
120
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
10 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