(VIDEO) Can Cellphone Increase the Size of Brain Tumor?

According to new study conducted by US federal on rats, mobile phone radiation did increase rats' brain tumors in males. It raises concerns as smartphone is being used so much by so many people on a daily basis and they are always carried along with each person during the day.

The National Institutes of Health study exposed rats with mobile phone radiation from the womb through the first two years of life for almost 9 hours a day. It discovered that tumors in 2 to 3 percent of male rats, which the study's authors called low. But females weren't influnced at all and, surprisingly, the rats not bombarded to the cellphone radiation died much faster - at double the rate - of those that were.

The outcome were preliminary, and only partial of the study will be released.

Some of the study's own reviewers had difficulty accepting the results since of the strange factors, such as rats in the group that wasn't exposed didn't contract what would be the normal number of brain tumors for that population.

"I am unable to accept the authors' conclusions," wrote outside reviewer Dr Michael Lauer, deputy director of NIH's office of extra-mural research. "I suspect that this experiment is substantially underpowered and that the few positive results found reflect false positive findings." The fact that the rats exposed to radiation survived longer than those that weren't "leaves me even more sceptical of the authors' claims", Lauer wrote. Four other study reviewers - three from NIH - also raised questions about the way the study was conducted and its result.

The study is a piece of a seven-year, $25 million investment led by the National Toxicology Program at the solicitation of the Food and Drug Administration.

Bucher were not able to explain that strange factor, nor could he explain why females were not affected at all.

“This is the first study to actually show that non-ionizing radiation (causes) cancer,” said Dr. Otis Brawley, the American Cancer Society’s chief medical officer.

“If cellphones cause cancer, they don’t cause a lot of cancer,” he said in an interview. “It’s not as carcinogenic as beef.”

He said people should be far more concerned about “distraction caused by cellphone,’” which he said causes more deaths.

If people were truly concerned about their health using smartphones, they should use Bluetooth or headsets, Brawley said.

Scientists noted these findings surely support the argument that researchers need to investigage real people using real cellphones in the U.S.