THE WOODLANDS, Texas--(BUSINESS WIRE)--Opexa Therapeutics, Inc. (NASDAQ: OPXA), a company developing Tovaxin®, a novel T-cell therapy for multiple sclerosis (MS), today announced it has recently added a key international opinion leader to its Scientific Advisory Board. Mark Freedman, M.D., is a professor of medicine in the field of neurology at the University of Ottawa, and director of the Multiple Sclerosis Research Unit at the Ottawa Hospital, General Campus. He will be joining other colleagues of high regard on Opexa’s Scientific Advisory Board: Dawn McGuire, M.D. (Chair), Doug Arnold, M.D., Edward Fox, M.D., Ph.D., Hans-Peter Hartung, M.D., Clyde Markowitz, M.D., Paul O’Connor, M.D., and Arthur Vandenbark, Ph.D.