1. Section of Periodontics, School of Dentistry University of California (UCLA) Los Angeles California USA
2. Department of Dentistry Federal University of Rio Grande do Norte (UFRN) Natal Rio Grande do Norte Brazil
3. Brazilian Agricultural Research Corporation (Embrapa) Rio de Janeiro Brazil
4. Department of Morphology Federal University of Paraíba (UFPB) João Pessoa Paraíba Brazil
5. Department of Pharmacy Federal University of Rio Grande do Norte (UFRN) Natal Rio Grande do Norte Brazil
6. Department of Morphology Federal University of Rio Grande do Norte (UFRN) Natal Rio Grande do Norte Brazil
7. Department of Biophysics and Pharmacology Federal University of Rio Grande do Norte (UFRN) Natal Rio Grande do Norte Brazil