1. Division of Operative Dentistry; Department of Restorative Dental Sciences; University of Florida; Gainesville FL USA
2. Department of Oral Biology; University of Florida; Gainesville FL USA
3. Department of Epidemiology; College of Public Health and Health Professions; University of Florida; Gainesville FL USA
4. Department of Microbiology; The Forsyth Institute; Cambridge MA USA
5. Biological Sciences; Wellesley College; Wellesley MA USA
6. Harvard School of Dental Medicine; Boston MA USA