Samsung B1100L Manual page 42

gland, leukemia, or other cancers. None of the studies demonstrated
the existence of any harmful health effects from devices RF exposures.
However, none of the studies can answer questions about long-term
exposures, since the average period of device use in these studies was
around three years.
What research is needed to decide whether RF exposure
from devices poses a health risk?
A combination of laboratory studies and epidemiological studies of
people actually using devices 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 studies is hampered by
difficulties in measuring actual RF exposure during day-to-day use of
devices. Many factors affect this measurement, such as the angle at
which the device is held, or which model of device is used.
What is FDA doing to find out more about the possible
health effects of devices RF?
FDA is working with the U.S. National Toxicology Program and with
groups of investigators around the world to ensure that high priority
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