1. Department of Oral Pathology School of Dentistry Federal University of Rio Grande do Sul Porto Alegre Brazil
2. Department of Oral Diagnosis Piracicaba Dental School University of Campinas Piracicaba Brazil
3. Department of Oral Pathology University of Caxias do Sul (UCS)Caxias do Sul Porto Alegre Brazil
4. Department of Oral Medicine Hospital de Clínicas de Porto Alegre (HCPA/UFRGS) Porto Alegre Brazil
5. Molecular and Protein Analysis Unit (UAMP) Hospital de Clínicas de Porto Alegre (HCPA/UFRGS) Porto Alegre Brazil
6. Childhood Cancer Institute Porto Alegre Brazil
7. Department of Pediatric Oncology Porto Alegre Clínicas Hospital (HCPA/UFRGS) Porto Alegre Brazil