1. Head and Neck Institute, Cleveland Clinic, Cleveland, Ohio, USA
2. Department of Otolaryngology, Harvard Medical School, Boston, Massachusetts, USA
3. Department of Otolaryngology, Massachusetts Eye and Ear, Boston, Massachusetts, USA
4. Ohio University Heritage College of Osteopathic Medicine, Cleveland Clinic South Pointe Hospital, Cleveland, Ohio, USA
5. Department of Otorhinolaryngology, Mayo Clinic, Rochester, Minnesota, USA