1. Department of Medicine University of Colorado Denver Colorado USA
2. Department of Otolaryngology/Head & Neck Surgery University of North Carolina Chapel Hill North Carolina USA
3. Department of Medicine, Division of Hematology‐Oncology University of Tennessee Health Science Center Memphis Tennessee USA
4. Division of Head and Neck Surgical Oncology, Department of Otolaryngology Washington University School of Medicine St Louis Missouri USA
5. Division of Public Health Sciences, Department of Surgery Washington University School of Medicine St Louis Missouri USA
6. Division of Hematology/Oncology, Department of Medicine University of North Carolina Chapel Hill North Carolina USA