LG Electronics MMBB0309801(1.0) H manual Chemicals so as to be pre, Other studies exposed

Safety

	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 conditions
	under which people use wireless
	phones, so we do not know with
	certainty what the results of such
	studies mean for human health.
Safety	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

90any 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