1. Department of Otolaryngology, The University of Texas Medical Branch, Galveston, TX, USA
2. University of Oklahoma College of Medicine, Oklahoma, OK, USA
3. Alabama College of Osteopathic Medicine, Dothan, AL, USA
4. Oklahoma State University Center for Health Sciences, Tulsa, OK, USA
5. Department of Head and Neck Surgery & Communication Sciences, Duke University Medical Center, Durham, NC, USA