2010l-082 abnormalities background cancer cellphone cellphones child congresses dose-responserelationship environmentalexposure evaluation governmentpolicy healthaspects infant ionizing ionizingradiation leukemia measurement neoplasms nuclearpowerplants physiologicaleffect physiology qz200r12891986 radiation radiation-induced radiationeffects radiationprotection radiationtolerance radioactivepollution radioactivewastedisposal radiobiology radiofrequency radiotherapy toxicology wn600 wn620h43351990