Affiliation: | 1. School of Medicine, University of California, San Francisco, San Francisco, California, U.S.A;2. School of Medicine, Chang Gung University, Taoyuan, Taiwan Chang Gung Memorial Hospital, Taipei, Taiwan;3. Department of Otolaryngology–Head and Neck Surgery, University of California, San Francisco, San Francisco, California, U.S.A.;4. Department of Pathology, University of California, San Francisco, San Francisco, California, U.S.A. |