1. Department of Otolaryngology-Head & Neck Surgery; Stanford University School of Medicine; Stanford CA
2. Department of Otorhinolaryngology-Head & Neck Surgery; Mayo Clinic; Rochester MN
3. Department of Otolaryngology-Head & Neck Surgery; University of British Columbia School of Medicine; Vancouver BC Canada
4. Department of Otolaryngology-Head & Neck Surgery; Seoul National University Hospital; Seoul Korea
5. Department of Otolaryngology-Head & Neck Surgery; Kosin University College of Medicine; Busan Republic of Korea
6. Department of Otolaryngology-Head & Neck Surgery; China Medical University Hospital; Taichung Taiwan, ROC