1. Department of Epidemiology, Johns Hopkins School of Public Health, Baltimore, Maryland
2. Department of Pathology, Johns Hopkins School of Medicine, Baltimore, Maryland
3. Department of Otolaryngology–Head and Neck Surgery, University of California-San Francisco, San Francisco, California
4. Department of Pathology, University of California-San Francisco Medical Center, San Francisco, California
5. Department of Otolaryngology–Head and Neck Surgery, Johns Hopkins School of Medicine, Baltimore, Maryland
6. Department of Oncology, Johns Hopkins School of Medicine, Baltimore, Maryland
7. Department of Radiation Oncology, Johns Hopkins School of Medicine, Baltimore, Maryland