1. Department of Oral Diagnosis Piracicaba Dental School University of Campinas Piracicaba Brazil
2. Department of Oral Surgery and Pathology School of Dentistry Federal University of Minas Gerais Belo Horizonte Brazil
3. Cancer and Neurobiology Laboratory Experimental Research Center Porto Alegre Clinical Hospital Federal University of Rio Grande do Sul Porto Alegre Brazil
4. Children’s Cancer Institute Porto Alegre Brazil
5. Experimental Pathology Unit Clinics Hospital of Porto Alegre Federal University of Rio Grande do Sul Porto Alegre Brazil
6. Pediatric Oncology Service Clinical Hospital Federal University of Rio Grande do Sul Porto Alegre Brazil
7. Department of Pharmacology Institute for Basic Health Sciences Federal University of Rio Grande do Sul Porto Alegre Brazil
8. Department of Oral Pathology School of Dentistry Federal University of Rio Grande do Sul Porto Alegre Brazil