1. Department of Head and Neck Surgery, David Geffen School of Medicine ; University of California Los Angeles; Los Angeles California
2. Department of Otolaryngology-Head and Neck Surgery ; University of California, Irvine Medical Center; Orange California
3. Jonsson Comprehensive Cancer Center ; Ronald Reagan University of California Los Angeles Medical Center; Los Angeles California
4. University of California Los Angeles Head and Neck Cancer Program ; Ronald Reagan University of California Los Angeles Medical Center; Los Angeles California U.S.A.