1. Department of Otolaryngology – Head & Neck Surgery Baylor College of Medicine Houston Texas USA
2. Department of Head and Neck Surgery Kaiser Permanente Portland Oregon USA
3. Department of Otolaryngology – Head & Neck Surgery University of Kansas Medical Center Kansas City Kansas USA
4. Department of Internal Medicine Indiana University School of Medicine Indianapolis Indiana USA
5. Department of Internal Medicine George Washington School of Medicine & Health Sciences Washington District of Columbia USA
6. Department of Otolaryngology – Head & Neck Surgery St. Louis University School of Medicine St. Louis Missouri USA