1. Department of Otolaryngology–Head and Neck Surgery University of California San Francisco San Francisco California U.S.A.
2. Division of General Otolaryngology, Department of Otolaryngology–Head and Neck Surgery, Salivary Gland Center University of California San Francisco San Francisco California U.S.A.
3. Surgery Service, Department of Veterans Affairs Medical Center San Francisco California U.S.A.
4. Division of Head and Neck Oncologic and Endocrine Surgery, Department of Otolaryngology–Head and Neck Surgery, Salivary Gland Center University of California San Francisco San Francisco California U.S.A.