1. Department of Surgery; division of Otolaryngology-Head & Neck Surgery, University of California; San Diego California U.S.A.
2. Department of Surgery; division of Otolaryngology-Head & Neck Surgery, VA San Diego Healthcare; La Jolla California U.S.A.
3. Department of Otolaryngology-Head & Neck Surgery; Naval Medical Center San Diego; San Diego California U.S.A.