1. Oral Pathology Department, School of Dentistry Universidade Federal do Rio Grande do Sul (UFRGS) Porto Alegre Brazil
2. Department of Experimental Pathology Hospital de Clínicas de Porto Alegre (HCPA) Porto Alegre Brazil
3. Graduate Program in Dentistry/Endodontics, School of Dentistry Universidade Federal do Rio Grande do Sul (UFRGS) Porto Alegre Brazil
4. Department of Stomatology A.C.Camargo Cancer Center São Paulo Brazil
5. Department of Dentistry, School of Dentistry Universidade de São Paulo (FOUSP) São Paulo Brazil
6. Master and Doctorate in Endodontics Universidade Estadual Paulista (UNESP) São Paulo Brazil
7. Molecular Pathology Area, School of Dentistry Universidad de la República (UDELAR) Montevideo Uruguay