1. Department of Clinical Dentistry; Vale do Rio Verde University - UNINCOR; Tres Coracoes Brazil
2. Department of Physiology and Pharmacology; Federal University of Lavras - UFLA; Lavras Brazil
3. Department of Pediatric Dentistry; State University of Campinas - UNICAMP; Piracicaba Brazil
4. Department of Physiology; Federal University of Rio Grande do Sul - UFRGS; Porto Alegre Brazil