1. Piracicaba Dental School and Faculty of Medicine; University of Campinas; Piracicaba Brazil
2. Department of Oral and Maxillofacial Pathology; School of Clinical Dentistry; The University of Sheffield; Sheffield UK
3. Dental School; Federal University of Rio de Janeiro; Rio de Janeiro Brazil
4. Department of Otorhinolaryngology and Head and Neck Surgery; A.C. Camargo Cancer Center; Sao Paulo Brazil
5. Dental School; State University of Western Paraná; Cascavel Brazil
6. Medical and Dental Schools; Federal University of Rio Grande do Sul; Rio Grande do Sul Brazil
7. Department of Oral Pathology and Oral Biology; School of Dentistry; Faculty of Health Sciences; University of Pretoria; Pretoria South Africa