1. Department of Prosthodontics and Periodontology Piracicaba Dental School University of Campinas (UNICAMP) Piracicaba Brazil
2. Department of Physiological Science Piracicaba Dental School University of Campinas (UNICAMP) Piracicaba Brazil
3. Department of Oral Health and Diagnostic Sciences University of Connecticut School of Dental Medicine Farmington CT USA
4. Dental Research Division Department of Periodontology Guarulhos University Guarulhos Brazil