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36
Safety Guidelines
exists.Epidemiologicalstudiescanprovide
datathatisdirectlyapplicabletohuman
populations,but10ormoreyearsfollow-up
maybeneededtoprovideanswersabout
somehealtheffects,suchascancer.
Thisisbecausetheintervalbetweenthe
timeofexposuretoacancer-causingagent
andthetimetumorsdevelop-iftheydo
maybemany,manyyears.Theinterpretation
ofepidemiologicalstudiesishamperedby
difficultiesinmeasuringactualRFexposure
duringday-to-dayuseofwirelessphones.
Manyfactorsaffectthismeasurement,such
astheangleatwhichthephoneisheld,or
whichmodelofphoneisused.
6. What is the FDA doing to find out more
about the possible health effects of
wireless phone RF?
TheFDAisworkingwiththeU.S.National
ToxicologyProgramandwithgroupsof
investigatorsaroundtheworldtoensurethat
highpriorityanimalstudiesareconducted
toaddressimportantquestionsaboutthe
effectsofexposuretoradiofrequencyenergy
(RF).TheFDAhasbeenaleadingparticipant
intheWorldHealthOrganizationInternational
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