Blinded Independent Validation Study Highlights Effectiveness of Tissue Systems Pathology Test in Predicting Risk of Progression to Esophageal Cancer in Patients with Barrett's Esophagus Data Presented at DDW 2019 Demonstrate Test Potential to Identify Patients Who May Benefit from Increased Surveillance and Early Therapeutic Intervention  PITTSBURGH, PA, May 21, 2019 (GLOBE...