1. Oral Medicine Unit, Department of Clinic and Preventive Dentistry Universidade Federal de Pernambuco Recife Brazil
2. Department of Oral Medicine, Faculty of Dentistry, Oral & Craniofacial Sciences King's College London London UK
3. Department of Oral Diagnosis, Piracicaba Dental School Universidade Estadual de Campinas Piracicaba Brazil
4. Rheumatology Unit, Hospital das Clínicas Universidade Federal de Pernambuco Recife Brazil