Samsung SCH-A310 Series User Manual page 120

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 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 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, glaucoma,
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 phones RF exposures. However,
none of the studies can answer questions about long-term exposures, since
average period of phone use in these studies was around three years.
What research is needed
to decide whether RF exposure
from wireless phones poses
a health threat?
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
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