1. Department of Oral Pathology, Faculty of Odontology, University of Chile, Sergio Livingstone 943, Independencia, 8390-492 Santiago, Chile
2. Dental and Maxillo Facial Service, Clinical Hospital of University of Chile, Santos Dumont 999, Independencia, 8380456 Santiago, Chile
3. Faculty of Odontology, University of Valparaíso, Carvallo 211, 2360004 Valparaíso, Chile
4. Cardio-Vascular Department, Clinical Hospital of University of Chile, Santos Dumont 999, Independencia, 8380456 Santiago, Chile
5. Medicine Department, Clinical Hospital of University of Chile, Santos Dumont 999, Independencia, 8380456 Santiago, Chile
6. Department of Community and Basic Sciences, Faculty of Odontology, University of Chile, Sergio Livingstone 943, Independencia, 8390-492 Santiago, Chile