1. Department of Microbial Pathogenesis, Dental School, University of Maryland–Baltimore, Baltimore, Maryland, USA
2. Graduate Program in Life Sciences, Molecular Microbiology and Immunology Program, University of Maryland–Baltimore, Baltimore, Maryland, USA
3. Department of Otorhinolaryngology–Head and Neck Surgery, Perelman School of Medicine, The University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania, USA
4. Surgical Service, Philadelphia Veterans Affairs Medical Center, Philadelphia, Pennsylvania, USA
5. Monell Chemical Senses Center, Philadelphia, Pennsylvania, USA
6. Department of Dermatology, School of Medicine, Johns Hopkins University, Baltimore, Maryland, USA
7. Department of Microbiology and Immunology, School of Medicine, University of Maryland–Baltimore, Baltimore, Maryland, USA