1. Department of Oral Pathology; School of Dentistry; Universidade Federal de Minas Gerais; Belo Horizonte Minas Gerais Brazil
2. Department of Pathology; Biological Sciences Institute; Universidade Federal de Minas Gerais; Belo Horizonte Minas Gerais Brazil
3. Department of Dentistry; Universidade Estadual de Montes Claros; Montes Claros Brazil