1. Department of Otolaryngology, Temple University School of Medicine, Philadelphia, Pennsylvania, USA
2. Department of Otolaryngology, University of Michigan, Ann Arbor, Michigan, USA
3. UCLA Head and Neck Cancer Program, Jonsson Comprehensive Cancer Center, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, California, USA
4. Department of Otolaryngology, Stanford University, Stanford, California, USA
5. Department of Otolaryngology, Indiana University, Indianapolis, Indiana, USA