1. Department of Clinical and Preventive Dentistry, Oral Pathology Unit, Federal University of Pernambuco, Recife, Pernambuco, Brazil.
2. Department of Clinical and Preventive Dentistry, Oral Medicine Unit, Federal University of Pernambuco, Recife, Pernambuco, Brazil.
3. Department of Oral and Maxillofacial Surgery, Hospital Geral de Areas, Recife, Pernambuco, Brazil.