Affiliation: | 1. Department of Otolaryngology–Head and Neck Surgery, Indiana University School of Medicine, Indianapolis, Indiana, U.S.A.;2. Department of Epidemiology, Indiana University-Purdue University Indianapolis, Indiana, U.S.A.;3. Department of Otolaryngology-Head and Neck Surgery, University of Louisville, Louisville, Kentucky, U.S.A.;4. Division of Otolaryngology-Head and Neck Surgery, Cedars-Sinai Medical Center, Los Angeles, Los Angeles, California, U.S.A. |