1. Department of Periodontology, Dental Research Division, Guarulhos University, Guarulhos 07023-070, SP, Brazil
2. Department of Oral Surgery, Faculty of Dentistry, Oral & Craniofacial Sciences, King’s College London, London SE1 9SP, UK
3. Department of Periodontology, Tufts University School of Dental Medicine, Boston, MA 02111, USA
4. Departament of Bioscienses, Piracicaba Dental School, University of Campinas, Piracicaba 13414-903, SP, Brazil