1. Department of Surgery, Memorial Sloan Kettering Cancer Center, New York
2. Department of Radiology, Memorial Sloan Kettering Cancer, New York
3. Laboratory Medicine/Pathology, Cleveland Clinic, Weston, Florida
4. Prince of Wales Hospital, Sydney, New South Wales, Australia
5. Instituto Nazionale, Milan, Italy
6. The Royal National Throat, Nose, and Ear Hospital, London, United Kingdom
7. UC Davis, Davis, California
8. Department of Otolaryngology, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel
9. Department of Otolaryngology-Head and Neck Surgery, University of Toronto, Toronto, Canada
10. Cancer Institute Hospital, Tokyo, Japan
11. Massachusetts Eye and Ear Hospital, Boston, Massachusetts
12. Hospital do Cancer AC Camargo, Sao Paulo, Brazil
13. University of Virginia Health System, Charlottesville, Virginia
14. Hospital das Clinicas, Sao Paulo, Brazil
15. Tata Memorial Hospital, Mumbai, India
16. Center for Head and Neck Surgery, Denver, Colorado
17. University of Pittsburgh, Pittsburgh, Pennsylvania
18. University of Hong Kong, Hong Kong