1. Faculty of Dentistry, Universidad Andres Bello, Echaurren 237, Santiago 8370133, Chile
2. International Center for Clinical Studies (CIEC), Probity Medical Research, Manzano 343, Santiago 8420383, Chile
3. Laboratory of Periodontal Biology, Faculty of Dentistry, Universidad de Chile, Olivos 943, Santiago 8380544, Chile
4. Department of Dermatology, Faculty of Medicine, Universidad de Los Andes, Av. Plaza 2501, Santiago 7620157, Chile
5. Department of Pathology and Oral Medicine, Faculty of Dentistry, Universidad de Chile, 943 Olivos Street, Santiago 8380544, Chile