THE WOODLANDS, Texas--(BUSINESS WIRE)--Opexa Therapeutics, Inc. (NASDAQ:OPXA), a company involved in the development and commercialization of cell therapies, today announced the completion of patient enrollment in a 150-patient Phase IIb safety and efficacy study (TERMS). The trial design is a U.S. multicenter, randomized, double-blind, placebo-controlled study of subcutaneous Tovaxin™ in subjects with Clinically Isolated Syndrome (CIS) or Relapsing/Remitting Multiple Sclerosis (RRMS).