1. David Geffen School of Medicine; University of California Irvine; Irvine
2. Department of Head and Neck Surgery; University of California Irvine; Irvine
3. Department of Head and Neck Surgery; Los Angeles California U.S.A
4. Head and Neck Cancer Program; Los Angeles California U.S.A
5. Department of Pathology and Laboratory Medicine; University of California Los Angeles; Los Angeles California U.S.A
6. Jonsson Comprehensive Cancer Center; Los Angeles California U.S.A