Men beware of prolonged and excessive use of mobile phones as a recent study conducted by the National Toxicology Program (NTP) has shown that male rats exposed to high levels of radio frequency radiation (RFR) like that used in 2G and 3G cell phones got cancerous heart tumours highlighted a recent media report. Not just heart tumours the study showed evidence of tumours in the brain and adrenal gland. However the affect of such radiations on female rats male and female mice was found to be equivocal. The exposures used in the studies cannot be compared directly to the exposure