(KAIT/NBC) - A recent government study using lab rodents took a close look at whether cell phones could be linked to cancer.
Researchers looked into how the radiation from cell phones could affect the risk for cancer. In the study they used rats, but they said the evidence indicates a greater risk than they originally thought.
Researchers exposed rats to intermittent whole-body radiation for nine hours a day, seven days a week, for two years. They said it's the equivalent to a lifetime of exposure of radio frequency radiation from average cell phone use.
The results showed two to three percent of the rats developed a tumor, more than the researchers expected.
Dr. Debra Patt is the former chair of the cancer committee for the Texas Medical Association. She said she would not change her cell phone use just yet.
"I don't think that this study is enough yet to change behavior. I don't think there's conclusive evidence of an increased risk of cancer because of exposure based on what we see from this finding," said Dr. Patt, oncologist.
The Food and Drug Administration said it will take a deeper look.