1. Department of Head and Neck Surgery Los Angeles California
2. Department of Otolaryngology–Head and Neck SurgeryUniversity of California, San Francisco Medical Center San Francisco California U.S.A
3. Department of Pathology and Laboratory Medicine Los Angeles California
4. University of California, Los Angeles Head and Neck Cancer ProgramUniversity of California, Los Angeles Medical Center Los Angeles California
5. Jonsson Comprehensive Cancer Center Los Angeles California