1 Unit of Histology and Embryology, Department of Basic Biomedical Sciences, Faculty of Health Sciences, University of Talca, Talca, Chile ; Department of Oral Diagnosis, School of Dentistry, State University of Campinas (UNICAMP), Piracicaba, São Paulo, Brazil ; Mass Spectrometry Laboratory, Brazilian Biosciences National Laboratory - CNPEM, Campinas, São Paulo, Brazil.
2 Unit of Oral Pathology, Department of Stomatology, Faculty of Health Sciences, University of Talca, Talca, Chile.