The National Toxicology Programm (NTP), USA, has released two draft reports on studies on cell phone radiofrequency radiation in rats and mice. The main result is that high exposure to radiofrequency radiation resulted in tumors in tissues surrounding nerves in the hearts of male rats, but not female rats or any mice. The exposure levels used in the studies were equal to and higher than the highest level permitted for local tissue exposure in cell phone emissions today. Cell phones typically emit lower levels of radiation than the maximum level allowed. NTP will hold an external expert review of its complete findings from these rodent studies on March 26-28.