1. Department of Otorhinolaryngology—Head and Neck Surgery University of Pennsylvania Health System Philadelphia Pennsylvania USA
2. Head and Neck Institute Cleveland Clinic Cleveland Ohio USA
3. Division of Pediatric Otolaryngology Children's Hospital of Pittsburgh of UPMC Pittsburgh Pennsylvania USA
4. Department of Otolaryngology University of Pittsburgh Medical Center Pittsburgh Pennsylvania USA
5. Department of Otolaryngology – Head and Neck Surgery Medical University of South Carolina Charleston South Carolina USA
6. MUSC Hollings Cancer Center Charleston South Carolina USA
7. Department of Otolaryngology – Head and Neck Surgery Thomas Jefferson University Philadelphia Pennsylvania USA
8. Cancer Risk and Control Program of Excellence Sidney Kimmel Cancer Center Philadelphia Pennsylvania USA