A ten-year study into cell phones conducted by the World Health Organization (WHO) has found a link between long term use and brain tumors. The internationally-respected body will release the official results of their study before the end of the year, but will soon begin issuing a public health message with its findings, according to the New York Post.

The $30 million decade-long project surveyed 12,800 people in 13 countries, and included tumor sufferers as well as healthy cell phone users. No specific results of the study have been released, but preliminary results have linked mobile phone exposure to three types of brain tumour and a tumour of the salivary gland.

This finding comes on the heels of similar reports recently by the International EMF Collaborative and the Environmental Working Group (EWG) as well as a Senate hearing chaired by Sen. Tom Harkin, D-Iowa, looking into the health risks of cell phone use.

The head of the WHO study, Dr. Elisabeth Cardis, said, “In the absence of definitive results and in the light of a number of studies which, though limited, suggest a possible effect of radiofrequency radiation, precautions are important.” She further stated that children should be restricted, not banned, from cell phone use.