Dr. Leif Salford is a neurosurgeon at Lund University Hospital (Sweden), and Chairman of the Department of Neurosurgery. Since 1988 he has led a team of researchers that have exposed thousands of laboratory rats to microwave radiation from various sources. Since the late 1990s they have used mobile telephones as the source of this radiation.
The results have been consistent and alarming: not only does radiation from a mobile phones damage the blood-brain barrier, but it does so at even when the exposure level is reduced a thousandfold.
This is presentation by Dr. Leif Salford on the effects of radio frequency radiation (RF) upon the brain. The statistics are jolting, to say the least: YouTube Link