Different studies have argued whether cell phone radiation causes cancer or not. For instance, a huge cell phone study found no link between cell towers and cancer, but almost one year after those results were released, the World Health Organization labeled cell phone radiation as a possible carcinogenic hazard. 

Now, a new study can be added to the "no cancer link" category.

Martin Roosli, study leader and an epidemiologist at the Swiss Tropical and Public Health Institute in Basel, and a team of researchers, have found no link between cell phone radiation and cancer in children and adolescents. 

Cell phones emit non-ionizing radiation, which can cause atoms in a molecule to vibrate with its energy but cannot remove electrons. While this radiation is not strong enough to damage DNA, some researchers believe the risk remains, especially in children. With children using cell phones at younger ages such a nine or 10-years-old, researchers fear that the radiation could affect their developing nervous system. Researchers have also noted that cell phone emissions penetrate deeper into the outer brain tissue of children.

Roosli and his team decided to look into this matter further by studying 352 people between the ages of seven and 19 who were diagnosed with a brain tumor between 2004 and 2008. The team also studied the cell phone use (or non-use) of 646 control subjects who were in the same age group. All subjects were from Denmark, Norway, Sweden and Switzerland. 

Researchers looked at how often both groups used cell phones through usage data from wireless providers, and also asked the subjects questions regarding usage. 

Before making any conclusions, Roosli noted that subjects had only used cell phones for about an average of four years total, and that the time spent on voice calls was "relatively small" since children mostly text. In addition, brain cancer patients could not always recall their phone usage, and phone bills were not always precise. This means that the study likely wasn't long enough to produce solid results, and without the cell phones directly to their ear, the outer brain tissue likely wasn't affected as much, if at all.

Nevertheless, Roosli and his team concluded that regular cell phone users were not more likely to develop tumors than non-users. Also, the study showed no increased risk of tumors for brain areas that received a high amount of exposure. 

And so we wait for more solid studies to arise.

This study was published in the Journal of the National Cancer Institute.