Institution: | 1. Richard L. Roudebush VA Medical Center Indiana University School of Medicine, Indianapolis, Indiana;2. Department of Otolaryngology, Indiana University School of Medicine, Indianapolis, Indiana;3. the John McClellan VA Medical Center University of Arkansas for Medical Sciences, Little Rock, Arkansas, U.S.A.;4. Department of Otolaryngology , University of Arkansas for Medical Sciences, Little Rock, Arkansas, U.S.A. |