1. Department of Oral Biology, School of Dental Medicine, 36 Foster Hall, 3435 Main St., and
2. Department of Microbiology & Immunology, School of Medicine and Biomedical Sciences, University at Buffalo, State University of New York, Buffalo, NY 14214, USA; and
3. Department of Periodontics/Oral Health and Systemic Disease and
4. Department of Microbiology and Immunology, University of Louisville Health Sciences Center, Louisville, KY 40292, USA