1. Department of Periodontology Universitat Internacional de Catalunya Barcelona Spain
2. Instituto de Investigación Biosanitaria ibs.Granada University of Granada Granada Spain
3. Andalusian School of Public Health (EASP) Granada Spain
4. CIBER of Epidemiology and Public Health (CIBERESP) Madrid Spain
5. Department of Restorative Dentistry Universitat Internacional de Catalunya Barcelona Spain