1. Postgraduate Program in Biophotonics Applied to Health Sciences, Nove de Julho University (UNINOVE), S�o Paulo 01504000, Brazil
2. Department of Oral Pathology, School of Dentistry, University of S�o Paulo, S�o Paulo 05508000, Brazil
3. Department of Biological Sciences, Bauru School of Dentistry, Bauru 17012901, Brazil
4. Department of Head and Neck Surgery, School of Medicine, University of S�o Paulo, S�o Paulo 03178200, Brazil
5. School of Public Health, University of S�o Paulo, S�o Paulo 03178200, Brazil
6. Department of Head and Neck Surgery, Barretos Cancer Hospital, Barretos 014784400, Brazil
7. Department of Molecular Biology, School of Medicine of S�o Jos� do Rio Preto, S�o Jos� do Rio Preto 15090000, Brazil