including that from cell phones and wi-fi, causes leakage in the blood-brain barrier ?" the brain's first line of defense against infections and toxic chemicals. Some of the most concerning conclusions result from the fact that even the weakest exposure levels to wireless radiation caused the greatest effect in causing the blood brain barrier to leak. Researchers in 13 other laboratories in 6 different countries had reported the same effect, but no one had proven whether it would lead to any damage in the long term. Then, in a study published June 2003 in Environmental Health Perspectives,