1. National Institute of Dental and Craniofacial Research, Oral Immunity and Infection Unit, Oral and Pharyngeal Cancer Branch, National Institutes of Health, Bethesda, MD 20892, USA.
2. National Institute of Dental and Craniofacial Research, Mucosal Immunology Section, Oral and Pharyngeal Cancer Branch, National Institutes of Health, Bethesda, MD 20892, USA.
3. Oral Health and Systemic Disease Research Group, University of Louisville School of Dentistry, Louisville, KY 40202, USA.
4. Department of Microbiology, University of Pennsylvania School of Dental Medicine, Philadelphia, PA 19104, USA.
5. National Institute of Allergy and Infectious Diseases, Laboratory of Clinical Infectious Diseases, National Institutes of Health, Bethesda, MD 20892, USA.
6. Department of Medicine, Department of Clinical Pathobiochemistry, and Institute for Clinical Chemistry and Laboratory Medicine, Technische Universität Dresden, 01307 Dresden, Germany.