BenQ Mobile GmbH & Co. OHG S68 Benutzerhandbuch

 of S68 POLARIS FCC us-en,  (30.01.2006, 10:09)

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held mobile phones might be harmful?
Briefly, there is not enough evidence 

to know for sure, either way; howev-

er, research efforts are on-going. 

The existing scientific evidence is 

conflicting and many of the studies 

that have been done to date have 

suffered from flaws in their research 

methods. Animal experiments inves-

tigating the effects of RF exposures 

characteristic of mobile phones have 

yielded conflicting results. A few ani-

mal studies, however, have suggest-

ed that low levels of RF could accel-

erate the development of cancer in 

laboratory animals. In one study, 

mice genetically altered to be predis-

posed to developing one type of can-

cer developed more than twice as 

many such cancers when they were 

exposed to RF energy compared to 

controls. There is much uncertainty 

among scientists about whether re-

sults obtained from animal studies 

apply to the use of mobile phones. 

First, it is uncertain how to apply the 

results obtained in rats and mice to 

humans. Second, many of the stud-

ies showed increased tumor devel-

opment used animals that had al-

ready been treated with cancer-

causing chemicals, and other studies 

exposed the animals to the RF virtu-

ally continuously – up to 22 hours 

per day.

For the past five years in the United 

States, the mobile phone industry 

has supported research into the safe-

ty of mobile phones. This research 

has resulted in two findings in partic-

ular that merit additional study:
1. In a hospital-based, case-control 

study, researchers looked for an asso-

ciation between mobile phone use 

and either glioma (a type of brain can-

cer) or acoustic neuroma (a benign 

tumor of the nerve sheath). No statis-

tically significant association was 

found between mobile phone use and 

acoustic neuroma. There was also no 

association between mobile phone 

use and gliomas when all types of 

gliomas were considered together. It 

should be noted that the average 

length of mobile phone exposure in 

this study was less than three years.
When 20 types of glioma were con-

sidered separately, however, an as-

sociation was found between mobile 

phone use and one rare type of glio-

ma, neuroepithelliomatous tumors. 

It is possible with multiple compari-

sons of the same sample that this as-

sociation occurred by chance. More-

over, the risk did not increase with 

how often the mobile phone was 

used, or the length of the calls. In 

fact, the risk actually decreased with 

cumulative hours of mobile phone 

use. Most cancer causing agents in-

crease risk with increased exposure. 

An ongoing study of brain cancers by 

the National Cancer Institute is ex-