1. Department of Otolaryngology-Head and Neck Surgery; Washington University; Saint Louis Missouri U.S.A
2. Washington University School of Medicine; Saint Louis Missouri U.S.A
3. Department of Otolaryngology-Head and Neck Surgery; Mayo Clinic; Rochester Minnesota U.S.A
4. Department of Radiation Oncology; Mayo Clinic; Rochester Minnesota U.S.A
5. Department of Radiation Oncology; Washington University; Saint Louis Missouri U.S.A
6. Head and Neck Surgery Center of Florida; Celebration Hospital; Celebration Florida U.S.A
7. Department of Surgery; University of Auckland Faculty of Medicine; Auckland New Zealand