1. Department of Otolaryngology–Head and Neck Surgery Indiana University School of Medicine Indianapolis Indiana USA
2. Department of Otolaryngology–Head and Neck Surgery University of California Davis Sacramento California USA
3. Department of Otolaryngology–Head and Neck Surgery Harvard Medical School Boston Massachusetts USA
4. Department of Otolaryngology–Head and Neck Surgery Medical University of South Carolina Charleston South Carolina USA
5. Department of Otolaryngology–Head and Neck Surgery University of Oklahoma College of Medicine Oklahoma City Oklahoma USA
6. Department of Otolaryngolog–Head and Neck Surgery Boston University Chobanian & Avedisian School of Medicine Boston Massachusetts USA