Affiliation: | 1. Department of Otolaryngology–Head and Neck Surgery, Oregon Health and Science University, Portland, Oregon;2. Department of Otolaryngology–Head and Neck Surgery, University of Washington, Seattle, Washington;3. Department of Public Health and Preventive Medicine, Division of Biostatistics, Oregon Health and Science University, Portland, Oregon;4. Oregon Institute of Occupational Health Sciences, Oregon Health and Science University, Portland, Oregon, U.S.A |