1. Department of Medicine, University of Washington , Seattle, WA, USA
2. Department of Medicine, University of California San Francisco , San Francisco, CA, USA
3. Department of Hematology and Medical Oncology, Cleveland Clinic Foundation , Cleveland, OH, USA
4. Department of Medicine, Yale University , New Haven, CT, USA
5. Department of Head and Neck-Endocrine Oncology, Moffit Cancer Center , Tampa, FL, USA
6. Department of Head and Neck Surgery, The University of Texas MD Anderson Cancer Center , Houston, TX, USA
7. Division of Head and Neck Surgery, Department of Otolaryngology-Head and Neck Surgery, Johns Hopkins University , Baltimore, MD, USA
8. Department of Radiation Oncology-Radiation Therapy, Stanford University , Palo Alto, CA, USA
9. Department of Radiation Oncology, University of California San Francisco , San Francisco, CA, USA
10. Department of Radiation Oncology, Fox Chase Cancer Center , Philadelphia, PA, USA
11. Kaiser Permanente Oakland , Oakland, CA, USA
12. Division of Neoplastic Diseases, Department of Medicine, Medical College of Wisconsin , Milwaukee, WI, USA
13. Division of Hematology/Oncology, Department of Medicine, University of Maryland , Baltimore, MD, USA
14. Department of Radiation Oncology, University of Pittsburgh , Pittsburgh, PA, USA
15. Department of Hematology and Medical Oncology, Emory University , Atlanta, GA, USA
16. Department of Molecular Oncology, Moffit Cancer Center , Tampa, FL, USA
17. Department of Medicine, Stanford University , Palo Alto, CA, USA
18. Department of Oncology, Johns Hopkins University , Baltimore, MD, USA
19. Department of Otolaryngology, University of Pittsburgh , Pittsburgh, PA, USA
20. National Institutes of Health , Bethesda, MD, USA