LG VX4700 - Manual (Page 122)

121 VX4700
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 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 wireless
phones. Many factors affect this measurement, such as the angle at
which the phone is held, or which model of phone is used.
6. What is the FDA doing to find out more about the
possible health effects of wireless phone RF?
The FDA is working with the U.S. National Toxicology Program and
with groups of investigators around the world to ensure that high
priority animal studies are conducted to address important questions
about the effects of exposure to radio frequency energy (RF).
The FDA has been a leading participant in the World Health