1. Department of Radiation Oncology; Mayo Clinic; Phoenix Arizona U.S.A.
2. Rush Medical College; Chicago Illinois U.S.A.
3. Department of Otolaryngology; Mayo Clinic; Phoenix Arizona U.S.A.
4. Department of Otolaryngology; Mayo Clinic; Rochester Minnesota U.S.A.
5. Department of Otolaryngology; Mayo Clinic; Jacksonville Florida U.S.A.
6. Department of Radiation Oncology; Mayo Clinic; Rochester Minnesota U.S.A.
7. Division of Health Sciences Research; Mayo Clinic; Phoenix Arizona U.S.A.