1. Department of Periodontology and Prosthodontics; Piracicaba Dental School; University of Campinas; Piracicaba Brazil
2. Department of Dentistry; University of Minas Gerais; Belo Horizonte Brazil
3. Department of Physiological Sciences; Piracicaba Dental School; University of Campinas; Piracicaba Brazil
4. Center for Research; The Educative Association of Brazil; Montes Claros Brazil
5. Department of Dentistry; University of Montes Claros; Montes Claros Brazil