University of California, San Francisco (UCSF) - Departments of Otolaryngology-Head and Neck Surgery and of Microbiology and Immunology, University of California, San Francisco (UCSF) - Department of Medicine, University of California, San Francisco (UCSF) - Department of Medicine, University of California, San Francisco (UCSF) - Department of Medicine, University of California, San Francisco (UCSF) - Departments of Otolaryngology-Head and Neck Surgery and of Microbiology and Immunology, Vitalant Research Institute, Vitalant Research Institute, University of California, San Francisco (UCSF) - Department of Medicine, University of California, San Francisco (UCSF) - Department of Medicine, Vitalant Research Institute, Vitalant Research Institute, University of California, San Francisco (UCSF) - Departments of Otolaryngology-Head and Neck Surgery and of Microbiology and Immunology and University of California, San Francisco (UCSF) - Department of Medicine