1. Department of Surgery-Otolaryngology; University of Adelaide; Adelaide Australia
2. Department of Otolaryngology; Pontificia Universidad Católica de Chile; Santiago Chile
3. Department of Otorhinolaryngology-Head and Neck Surgery; University of Pennsylvania; Philadelphia PA
4. Department of Otorhinolaryngology-Head and Neck Surgery; University of Texas McGovern Medical School at Houston; Houston TX
5. Division of Rhinology and Sinus/Skull Base Surgery; Oregon Health and Science University; Portland OR
6. Division of Otolaryngology Head and Neck Surgery; University of Utah; Salt Lake City UT
7. Department of ENT; Sankt Gertrauden Krankenhaus; Berlin Germany
8. Department of Otolaryngology, Tan Tock Seng Hospital; National University of Singapore; Singapore
9. Department of Otolaryngology; Military Institute of Medicine; Warsaw Poland
10. Professorial Unit, Royal National Throat Nose Ear Hospital; University College London; London UK
11. Department of Otolaryngology; Academic Medical Centre; Amsterdam the Netherlands