The study, published in the Journal of the National Cancer Institute, is the largest yet to find no bad news about the safety of cell phones and the radiofrequency energy they emit.

But even the lead researcher doubts it will end the debate.

"There's really no biological basis for you to be concerned about radio waves," said John Boice, a Vanderbilt University professor and scientific director of the International Epidemiology Institute in Rockville, Md. "Nonetheless, people are."

So Boice and colleagues at Copenhagen's Danish Cancer Society plan to continue tracking the Danish callers until at least some have used the phones for 30 years.

This so-called Danish cohort "is probably the strongest study out there because of the outstanding registries they keep," said Joshua Muscat of Pennsylvania State University, who also has studied cell phones and cancer.

"As the body of evidence accumulates, people can become more reassured that these devices are safe, but the final word is not there yet," Muscat added.

Cell phones beam radiofrequency energy that can penetrate the brain's outer edge, raising questions about cancers of the head and neck, brain tumors or leukemia. Most research has found no risk, but a few studies have raised questions. And while U.S. health officials insist the evidence shows no real reason for concern, they don't give the phones a definitive clean bill of health, either, pending long-term data on slow-growing cancers.

There have however been a number of prominent, peer-reviewed studies indicating that cell phone radiation can cause genetic damage, brain and blood cell dysfunction and a host of other health problems not related to cancer, now comes a Danish study that appears to say there is no danger at all.  I suppose that the study has some truth to it if the only thing you are concerned about is cancer.

Below is a Video Interview with one of the worlds leading Cell Phone Researchers.