1. Department of Otolaryngology–Head and Neck Surgery, University of Arkansas for Medical Sciences, Little Rock, AR
2. Department of Biostatistics, University of Arkansas for Medical Sciences, Little Rock, AR
3. Department of Geriatrics, University of Arkansas for Medical Sciences, Little Rock, AR
4. Central Arkansas VA Healthcare System, Little Rock, AR
5. Division of Otolaryngology, Milton S. Hershey Medical Center, Penn State University, Hershey, PA