1. Department of Otolaryngology-Head and Neck Surgery, Loma Linda University Medical Center, Loma Linda, California, USA.
2. Department of Head and Neck Surgery, University of California Los Angeles, Los Angeles, California, USA.
3. Case Western Reserve University School of Medicine, Cleveland, Ohio, USA.
4. Department of Pathology, Loma Linda University Medical Center, Loma Linda, California, USA.
5. Loma Linda University School of Medicine, Loma Linda, California, USA.