1. Department of Head and Neck Surgery, Kaiser Permanente Oakland Medical Center, Oakland, CA, USA
2. Department of Otolaryngology-Head and Neck Surgery, University of Pittsburgh Medical Center, Pittsburgh, PA, USA
3. Department of Otolaryngology-Head and Neck Surgery, University of Kentucky, Lexington, KY, USA
4. Department of Otolaryngology-Head and Neck Surgery, University of California, San Francisco Medical Center, San Francisco, CA, USA
5. Department of Graduate Medical Education, Kaiser Permanente Oakland Medical Center, Oakland, CA, USA