LG Electronics 8500 December 2000. Between them, the studies, Studies was around three years

Safety

	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
	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.
Saf	5. What research is needed to decide whether RF
	exposure from wireless phones poses a health
ety	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 Organization International Electromagnetic Fields (EMF) Project since its inception in 1996. An influential result of this work has been the development of a detailed agenda of research needs

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