1. Department of Otolaryngology‐Head and Neck Surgery University of California, San Francisco San Francisco California USA
2. Department of Otolaryngology‐Head and Neck Surgery Thomas Jefferson University Hospitals Philadelphia Pennsylvania USA
3. Department of Otolaryngology‐Head and Neck Surgery Southern California Permanente Medical Group Harbor City California USA
4. Department of Otolaryngology Washington University in St. Louis St. Louis Missouri USA
5. Department of Otolaryngology University of Pittsburgh Medical Center Pittsburgh Pennsylvania USA
6. Department of Otolaryngology Head & Neck Surgery Louisiana State University Health Sciences Center New Orleans Louisiana USA
7. Department of Veterans Affairs Medical Center Surgery Service San Francisco California USA