1. Department of Otolaryngology Thomas Jefferson University Philadelphia Pennsylvania U.S.A.
2. Department of Radiation Oncology Thomas Jefferson University Philadelphia Pennsylvania U.S.A.
3. Department of Otolaryngology New York‐Presbyterian Weill Cornell Medical Center New York New York U.S.A.
4. Department of Radiation Oncology Case Western Reserve School of Medicine Cleveland Ohio U.S.A.
5. Department of Otolaryngology University of Cincinnati Cincinnati Ohio U.S.A.