1. Oral Histopathology Laboratory; Health Sciences Faculty; University of Brasília; Brasília DF Brazil
2. Department of Dentistry; Federal University of Santa Catarina; Florianópolis SC Brazil
3. Department of Prosthodontics; Section of Orofacial Pain; Bauru School of Dentistry; University of São Paulo; Bauru SP Brazil
4. Epithelial Biology Laboratory; Department of Periodontics and Oral Medicine; Division of Oral Pathology; University of Michigan School of Dentistry; Ann Arbor MI USA
5. Department of Dentistry; University of Alberta; Edmonton AB Canada