1. Department of Otolaryngology‐Head and Neck Surgery, Washington University School of Medicine, St. Louis, Missouri, U.S.A.
2. Barnes Jewish Hospital Foundation—Tumor Research Project (Robert and Karen Isaacs Fund), St. Louis, Missouri, U.S.A.
3. G. Sossnoff Fund, St. Louis, Missouri, U.S.A.
4. Mallinckrodt Institute of Radiology‐Radiation Oncology Center, Washington University School of Medicine, St. Louis, Missouri, U.S.A.