87The scientific community at large therefore believes that the weightof scientific evidence does not show an association betweenexposure to Radio Frequency (RF) from cell phones and adversehealth outcomes. Still the scientific community has supportedadditional research to address gaps in knowledge. Some of thesestudies are described below.Interphone StudyInterphone is a large international study designed to determinewhether cell phones increase the risk of head and neck cancer. Areport published in the International Journal of Epidemiology (June,2010) compared cell phone usage for more than 5,000 people withbrain tumors (glioma and meningioma) and a similar number ofhealthy controls.Results of this study did NOT show that cell phones caused braincancer. In this study, most people had no increased risk of braincancer from using cell phones. For people with the heaviest use ofcell phones (an average of more than ½ hour per day, every day, forover 10 years) the study suggested a slight increase in brain cancer.However, the authors determined that biases and errors preventedany conclusions being drawn from this data. Additional informationabout Interphone can be found athttp://www.iarc.fr/en/media-centre/pr/2010/pdfs/pr200_E.pdf.Interphone is the largest cell phone study to date, but it did notanswer all questions about cell phone safety. Additional research isbeing conducted around the world, and the FDA continues to monitordevelopments in this field.