FLAGSTAFF, Ariz.--(BUSINESS WIRE)--W. L. Gore & Associates (Gore) today provided an update on the Gore REDUCE Clinical Study*, a prospective, randomized, multi-center, multi-national trial designed to demonstrate safety and effectiveness of the GORE HELEX Septal Occluder for Patent Foramen Ovale (PFO) closure in patients with history of cryptogenic stroke or imaging-confirmed Transient Ischemic Attack (TIA). The unique study, which includes up to fifty investigational sites in the U.S., Denmark, Finland, Norway and Sweden, is on track to meet its estimated completion in 2015.