1. Rocky Vista University College of Osteopathic Medicine Parker Colorado U.S.A.
2. Office of Medical Student Research Oklahoma State University Center for Health Sciences Tulsa Oklahoma U.S.A.
3. Department of Internal Medicine University of Oklahoma, School of Community Medicine Tulsa Oklahoma U.S.A.
4. Department of Otolaryngology—Head and Neck Surgery Oklahoma State University Medical Center Tulsa Oklahoma U.S.A.
5. Ascension Medical Group St. John ENT and Head and Neck Surgery Ascension St. John Tulsa Oklahoma U.S.A.