Health and safety information153Institute of Electrical and Electronic Engineers(IEEE). This standard specifies test methodsand performance requirements for hearing aidsand wireless phones so that no interferenceoccurs when a person uses a compatible phoneand a compatible hearing aid at the same time.This standard was approved by the IEEE in2000.FDA continues to monitor the use of wirelessphones for possible interactions with othermedical devices. Should harmful interferencebe found to occur, FDA will conduct testing toassess the interference and work to resolve theproblem.10.What are the results of the research donealready?The research done thus far has producedconflicting results, and many studies havesuffered from flaws in their research methods.Animal experiments investigating the effects ofradio frequency energy (RF) exposurescharacteristic of wireless phones have yieldedconflicting results that often cannot be repeatedin other laboratories. A few animal studies,however, have suggested that low levels of RFcould accelerate the development of cancer inlaboratory animals. However, many of thestudies that showed increased tumordevelopment used animals that had beengenetically engineered or treated with cancercausing chemicals so as to be pre-disposed todevelop cancer in the absence of RF exposure.Other studies exposed the animals to RF for upto 22 hours per day. These conditions are notsimilar to the conditions under which peopleuse wireless phones, so we don t know withcertainty what the results of such studies meanfor human health.Three large epidemiology studies have beenpublished since December 2000. Betweenthem, the studies investigated any possible