1. Department of Otolaryngology, Head and Neck Surgery Walter Reed National Military Medical Center Bethesda Maryland USA
2. Department of Otolaryngology Tulane University School of Medicine New Orleans Louisiana USA
3. Division of Rhinology and Endoscopic Skull Base Surgery Department of Otolaryngology – Head and Neck Surgery University of Washington Seattle Washington USA
4. Division of Rhinology and Skull Base Surgery Department of Otorhinolaryngology – Head and Neck Surgery Albert Einstein College of Medicine Bronx New York USA
5. Department of Head and Neck Surgery University of California Los Angeles Los Angeles California USA
6. Department of Otolaryngology – Head and Neck Surgery Washington University School of Medicine St. Louis Missouri USA
7. Department of Otorhinolaryngology and Communication Sciences Ochsner Clinic Foundation New Orleans Louisiana USA