1. From the Medical College of Wisconsin
2. The Departments of Otolaryngology–Head and Neck Surgery, Thomas Jefferson University and Graduate Hospital
3. The Department of Otolaryngology–Head and Neck Surgery, University of Colorado School of Medicine
4. The Department of Otolaryngology, Northwestern University School of Medicine
5. The Department of Otolaryngology, Beth Israel Medical Center
6. The Department of Otolaryngology–Head and Neck Surgery, George Washington University School of Medicine.