1. Department of Otolaryngology-Head and Neck Surgery, Loma Linda University Medical School, Loma Linda, California
2. Department of Otolaryngology-Head and Neck Surgery, Jerry L. Pettis Memorial Veterans Hospital, Loma Linda, California
3. Department of Pathology, Loma Linda University Medical School, Loma Linda, California
4. Department of Pathology, Jerry L. Pettis Memorial Veterans Hospital, Loma Linda, California