Samsung SCH a670 User Manual

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Section 14
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 the 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, 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 phones 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.
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 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