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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
98
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
cancercausing agent and the
time tumors develop - if they
do- may be many, many years.
The interpretation of
epidemiological studies is
hampered by difficulties in
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