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