1. Department of Oral Diagnosis; University of Campinas; Piracicaba Brazil
2. Department of Dentistry; University of Pernambuco; Recife Brazil
3. Department of Pathology; Federal University of Santa Catarina; Florianópolis Brazil
4. Department of Oral Pathology and Oral Biology; Faculty of Health Sciences; School of Dentistry; University of Pretoria; Pretoria South Africa