GreatCall Jitterbug How-To Manual page 148

effects of radio frequency energy (RF) exposures characteristic of wireless phones have
yielded conflicting results that often cannot be repeated in other laboratories. A 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
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 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.
Health and Safety Information 137