| Affiliation: | 1. Department of Otorhinolaryngology–Head and Neck Surgery, University of Pennsylvania, Perelman School of Medicine, Philadelphia, PA;2. Sidney Kimmel Medical College, Thomas Jefferson University, Philadelphia, PA;3. Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA;4. Leonard Davis Institute of Health Economics, University of Pennsylvania, Philadelphia, PA;5. Department of Biostatistics and Epidemiology, University of Pennsylvania, Perelman School of Medicine, Philadelphia, PA |
