1. Oral Histopathology Laboratory, Health Sciences Faculty; University of Brasília; Brasília Brazil
2. Natural Products Laboratory, Health Sciences Faculty; University of Brasilia; Brasília Brazil
3. Brazilian Centre for Evidence-Based Research, Department of Dentistry; Federal University of Santa Catarina; Florianopolis SC Brazil
4. School of Dentistry, Faculty of Medicine and Dentistry; University of Alberta; Edmonton AB Canada