1. Department of Otolaryngology, Head and Neck Surgery, Stanford University, Stanford, CA, USA.
2. Department of Otolaryngology, Head and Neck Surgery, Tehran University of Medical Sciences, Tehran, Iran.
3. Department of Medicine, Infectious Diseases, Stanford University, Stanford, CA, USA.
4. Department of Microbiology and Immunology, University of British Columbia, Vancouver, BC, Canada.
5. Department of Microbiology and Immunology, University of Otago, Dunedin, New Zealand.