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mean for human health. Three
large epidemiology studies have
been published since December
000. 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?
Acombination 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 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
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