LG Electronics VS750 few animal studies, however, have, studies have been published since, Safety

Safety

	few animal studies, however, have
	suggested that low levels of RF could
	accelerate the development of cancer in
	laboratory animals. However, many of the
	studies that showed increased tumor
	development used animals that had been
	genetically engineered or treated with
	cancer-causing chemicals so as to be pre-
	disposed to develop cancer in the absence
	of RF exposure. Other studies exposed the
	animals to RF for up to 22 hours per day.
	These conditions are not similar to the
Safety	conditions under which people use wireless
	phones, so we do not 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
78	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 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