Roland (2 of 2) (IMAGE) UT Southwestern Medical Center Caption Dr. Peter Roland, chairman of otolaryngology-head and neck surgery, is leading the local clinical trial of a new hybrid hearing aid/cochlear implant device designed for patients who can benefit from both. Credit UT Southwestern Medical Center Usage Restrictions Please use credit line. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.